diff --git a/res/layout/gallery_detail.xml b/res/layout/gallery_detail.xml
index 6c0951f53..ed4e5d855 100644
--- a/res/layout/gallery_detail.xml
+++ b/res/layout/gallery_detail.xml
@@ -19,7 +19,7 @@
     android:layout_width="fill_parent"
     android:layout_height="fill_parent" >
 
-    <ScrollView
+    <com.hippo.ehviewer.widget.ResponedScrollView
         android:id="@+id/detail_scroll"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
@@ -324,7 +324,7 @@
                 layout="@layout/preview_list"
                 android:visibility="gone" />
         </LinearLayout>
-    </ScrollView>
+    </com.hippo.ehviewer.widget.ResponedScrollView>
 
     <ScrollView
         android:id="@+id/more_detail_scroll"
diff --git a/res/layout/user_panel.xml b/res/layout/user_panel.xml
index b180f9eeb..ee155a379 100644
--- a/res/layout/user_panel.xml
+++ b/res/layout/user_panel.xml
@@ -15,6 +15,7 @@
      limitations under the License.
 -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:auto="http://schemas.android.com/apk/res-auto"
     android:layout_width="fill_parent"
     android:layout_height="wrap_content"
     android:orientation="horizontal" >
@@ -52,7 +53,7 @@
 
             <com.hippo.ehviewer.widget.SuperButton
                 android:id="@+id/register"
-                style="@style/SuperButton.Small"
+                style="@style/SuperButton.Tile.Small"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:layout_marginBottom="10.0dp"
@@ -61,7 +62,7 @@
 
             <com.hippo.ehviewer.widget.SuperButton
                 android:id="@+id/login"
-                style="@style/SuperButton.Small"
+                style="@style/SuperButton.Tile.Small"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:singleLine="true"
@@ -70,7 +71,7 @@
 
         <com.hippo.ehviewer.widget.SuperButton
             android:id="@+id/logout"
-            style="@style/SuperButton.Small"
+            style="@style/SuperButton.Tile.Small"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_alignParentBottom="true"
diff --git a/res/raw/thanks.html b/res/raw/thanks.html
index 2d8698403..aea158d09 100644
--- a/res/raw/thanks.html
+++ b/res/raw/thanks.html
@@ -15,6 +15,8 @@
 <br>
 <a href="https://github.com/JakeWharton/DiskLruCache">DiskLruCache</a>
 <br>
+<a href="https://github.com/FaizMalkani/FloatingActionButton">FloatingActionButton</a>
+<br>
 <a href="https://github.com/BYVoid/OpenCC">OpenCC</a>
 <br>
 <a href="https://github.com/jfeinstein10/SlidingMenu">SlidingMenu</a>
diff --git a/res/values/styles.xml b/res/values/styles.xml
index e390400d8..7928a708f 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -79,6 +79,12 @@
         <item name="@android:paddingRight">18dp</item>
     </style>
 
+    <style name="SuperButton.Tile.Small" parent="@style/SuperButton.Small">
+        <item name="@android:paddingTop">2dp</item>
+        <item name="@android:paddingBottom">2dp</item>
+        <item name="backgroundType">tile</item>
+    </style>
+
     <style name="MaterialProgress">
         <item name="@android:layout_width">48dip</item>
         <item name="@android:layout_height">48dip</item>
diff --git a/src/com/hippo/ehviewer/ImageLoader.java b/src/com/hippo/ehviewer/ImageLoader.java
index 29b392202..c69cd36d9 100644
--- a/src/com/hippo/ehviewer/ImageLoader.java
+++ b/src/com/hippo/ehviewer/ImageLoader.java
@@ -57,7 +57,9 @@ public class ImageLoader {
         mImageCache = ImageCache.getInstance(mContext);
 
         mLock = new Object();
-        new Thread(new LoadFromCacheTask()).start();
+        Thread thread = new Thread(new LoadFromCacheTask());
+        thread.setPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
+        thread.start();
     }
 
     public final static ImageLoader getInstance(final Context context) {
@@ -116,7 +118,9 @@ public class ImageLoader {
             synchronized (mLock) {
                 mDownloadTasks.push(loadTask);
                 if (mWorkingThreadNum < MAX_DOWNLOAD_THREADS) {
-                    new Thread(new DownloadImageTask()).start();
+                    Thread thread = new Thread(new DownloadImageTask());
+                    thread.setPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
+                    thread.start();
                     mWorkingThreadNum++;
                 }
             }
diff --git a/src/com/hippo/ehviewer/ehclient/EhClient.java b/src/com/hippo/ehviewer/ehclient/EhClient.java
index aeffb334b..956be6029 100644
--- a/src/com/hippo/ehviewer/ehclient/EhClient.java
+++ b/src/com/hippo/ehviewer/ehclient/EhClient.java
@@ -439,7 +439,7 @@ public class EhClient {
 
     public void getGList(final String url, final int mode, final Object checkFlag,
             final OnGetGListListener listener) {
-        new Thread(new Runnable() {
+        Thread thread = new Thread(new Runnable() {
             @Override
             public void run() {
                 HttpHelper hp = new HttpHelper(mAppContext);
@@ -476,7 +476,9 @@ public class EhClient {
 
                 mHandler.post(responder);
             }
-        }).start();
+        });
+        thread.setPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
+        thread.start();
     }
 
     // Get Gallery List from file search
@@ -560,10 +562,10 @@ public class EhClient {
         if (file == null && bitmap == null)
             listener.onFailure(checkFlag, "All null"); // TODO
 
-        new Thread(new Runnable() {
+        Thread thread = new Thread(new Runnable() {
             @Override
             public void run() {
-                HttpHelper hp = new HttpHelper(mAppContext);
+                HttpHelper hh = new HttpHelper(mAppContext);
 
                 List<HttpHelper.FormData> dataList = new LinkedList<HttpHelper.FormData>();
                 HttpHelper.FormData data;
@@ -600,11 +602,11 @@ public class EhClient {
                     dataList.add(data);
                 }
 
-                String body = hp.postFormData(getFileSearchUrl(apiMode), dataList);
+                String body = hh.postFormData(getFileSearchUrl(apiMode), dataList);
                 GetGListFromImageSearchResponder responder;
                 if (body != null) { // Get ok
                     // If no element, it might be a notice
-                    String newUrl = hp.getLastUrl();
+                    String newUrl = hh.getLastUrl();
                     if (newUrl == null) {
                         responder = new GetGListFromImageSearchResponder(listener, checkFlag, "Location is null");
                     } else if (!body.contains("<")) {
@@ -631,12 +633,14 @@ public class EhClient {
                         }
                     }
                 } else {
-                    responder = new GetGListFromImageSearchResponder(listener, checkFlag, hp.getEMsg());
+                    responder = new GetGListFromImageSearchResponder(listener, checkFlag, hh.getEMsg());
                 }
 
                 mHandler.post(responder);
             }
-        }).start();
+        });
+        thread.setPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
+        thread.start();
     }
 
     // Get gallery Detail
@@ -645,64 +649,93 @@ public class EhClient {
         public void onFailure(String eMsg);
     }
 
+    private class GetGDetaiResponder implements Runnable {
+        private final boolean isOk;
+        private final OnGetGDetailListener listener;
+        private final GalleryDetail gd;
+        private final String eMesg;
+
+        public GetGDetaiResponder(OnGetGDetailListener listener, GalleryDetail gd) {
+            this.isOk = true;
+            this.listener = listener;
+            this.gd = gd;
+            this.eMesg = null;
+        }
+
+        public GetGDetaiResponder(OnGetGDetailListener listener, String eMsg) {
+            this.isOk = false;
+            this.listener = listener;
+            this.gd = null;
+            this.eMesg = eMsg;
+        }
+
+        @Override
+        public void run() {
+            if (isOk)
+                listener.onSuccess(gd);
+            else
+                listener.onFailure(eMesg);
+        }
+    }
+
     public void getGDetail(final String url, final GalleryDetail md,
             final OnGetGDetailListener listener) {
-        new Thread(new Runnable() {
+        Thread thread = new Thread(new Runnable() {
             @Override
             public void run() {
-                HttpHelper hp = new HttpHelper(mAppContext);
-                hp.setOnRespondListener(new HttpHelper.OnRespondListener() {
-                    @Override
-                    public void onSuccess(Object obj) {
-                        String body = (String)obj;
-                        DetailParser parser = new DetailParser();
-                        int result = parser.parser(body, DetailParser.DETAIL | DetailParser.TAG
-                                | DetailParser.PREVIEW_INFO | DetailParser.PREVIEW
-                                | DetailParser.COMMENT);
-                        if (result == DetailParser.OFFENSIVE) {
-                            md.firstPage = "offensive";
-                            listener.onSuccess(md);
-                        } else if (result == DetailParser.PINING) {
-                            md.firstPage = "pining";
-                            listener.onSuccess(md);
-                        } else if ((result & (DetailParser.DETAIL | DetailParser.PREVIEW_INFO)) != 0) {
-                            md.thumb = parser.thumb;
-                            md.title = parser.title;
-                            md.title_jpn = parser.title_jpn;
-                            md.category = parser.category;
-                            md.uploader = parser.uploader;
-                            md.posted = parser.posted;
-                            md.pages = parser.pages;
-                            md.size = parser.size;
-                            md.resized = parser.resized;
-                            md.parent = parser.parent;
-                            md.visible = parser.visible;
-                            md.language = parser.language;
-                            md.people = parser.people;
-                            md.rating = parser.rating;
-                            md.firstPage = parser.firstPage;
-                            md.previewPerPage = parser.previewPerPage;
-                            md.previewSum = parser.previewSum;
+                HttpHelper hh = new HttpHelper(mAppContext);
+                String body = hh.get(url);
+                GetGDetaiResponder responder;
+                if (body != null) {
+                    DetailParser parser = new DetailParser();
+                    int result = parser.parser(body, DetailParser.DETAIL | DetailParser.TAG
+                            | DetailParser.PREVIEW_INFO | DetailParser.PREVIEW
+                            | DetailParser.COMMENT);
+                    if (result == DetailParser.OFFENSIVE) {
+                        md.firstPage = "offensive";
+                        responder = new GetGDetaiResponder(listener, md);
+                    } else if (result == DetailParser.PINING) {
+                        md.firstPage = "pining";
+                        responder = new GetGDetaiResponder(listener, md);
+                    } else if ((result & (DetailParser.DETAIL | DetailParser.PREVIEW_INFO)) != 0) {
+                        md.thumb = parser.thumb;
+                        md.title = parser.title;
+                        md.title_jpn = parser.title_jpn;
+                        md.category = parser.category;
+                        md.uploader = parser.uploader;
+                        md.posted = parser.posted;
+                        md.pages = parser.pages;
+                        md.size = parser.size;
+                        md.resized = parser.resized;
+                        md.parent = parser.parent;
+                        md.visible = parser.visible;
+                        md.language = parser.language;
+                        md.people = parser.people;
+                        md.rating = parser.rating;
+                        md.firstPage = parser.firstPage;
+                        md.previewPerPage = parser.previewPerPage;
+                        md.previewSum = parser.previewSum;
 
-                            md.tags = parser.tags;
-                            md.previewLists = new PreviewList[md.previewSum];
-                            md.previewLists[0] = parser.previewList;
-                            md.comments = parser.comments;
-                            listener.onSuccess(md);
-                        } else if (result == DetailParser.ERROR) {
-                            listener.onFailure(parser.eMesg);
-                        } else {
-                            listener.onFailure(mAppContext.getString(R.string.em_parser_error));
-                        }
+                        md.tags = parser.tags;
+                        md.previewLists = new PreviewList[md.previewSum];
+                        md.previewLists[0] = parser.previewList;
+                        md.comments = parser.comments;
+                        responder = new GetGDetaiResponder(listener, md);
+                    } else if (result == DetailParser.ERROR) {
+                        responder = new GetGDetaiResponder(listener, parser.eMesg);
+                    } else {
+                        responder = new GetGDetaiResponder(listener,
+                                mAppContext.getString(R.string.em_parser_error));
                     }
-                    @Override
-                    public void onFailure(String eMsg) {
-                        listener.onFailure(eMsg);
-                    }
-                });
-                hp.get(url);
+                } else {
+                    responder = new GetGDetaiResponder(listener, hh.getEMsg());
+                }
+
+                mHandler.post(responder);
             }
-        }).start();
+        });
+        thread.setPriority(android.os.Process.THREAD_PRIORITY_BACKGROUND);
+        thread.start();
     }
 
     // Get preview list
diff --git a/src/com/hippo/ehviewer/ui/GalleryDetailActivity.java b/src/com/hippo/ehviewer/ui/GalleryDetailActivity.java
index a59caf7ae..0a13aae57 100644
--- a/src/com/hippo/ehviewer/ui/GalleryDetailActivity.java
+++ b/src/com/hippo/ehviewer/ui/GalleryDetailActivity.java
@@ -61,6 +61,7 @@ import android.widget.ViewSwitcher;
 import com.faizmalkani.floatingactionbutton.FloatingActionButton;
 import com.hippo.ehviewer.ImageLoader;
 import com.hippo.ehviewer.R;
+import com.hippo.ehviewer.cache.ImageCache;
 import com.hippo.ehviewer.data.ApiGalleryDetail;
 import com.hippo.ehviewer.data.Comment;
 import com.hippo.ehviewer.data.GalleryDetail;
@@ -87,6 +88,7 @@ import com.hippo.ehviewer.widget.LoadImageView;
 import com.hippo.ehviewer.widget.MaterialProgress;
 import com.hippo.ehviewer.widget.ProgressiveRatingBar;
 import com.hippo.ehviewer.widget.RefreshTextView;
+import com.hippo.ehviewer.widget.ResponedScrollView;
 import com.hippo.ehviewer.widget.SimpleGridLayout;
 import com.hippo.ehviewer.widget.SuperButton;
 import com.hippo.ehviewer.widget.SuperToast;
@@ -94,6 +96,7 @@ import com.hippo.ehviewer.windowsanimate.WindowsAnimate;
 
 public class GalleryDetailActivity extends AbstractActivity
         implements View.OnClickListener,
+        ResponedScrollView.OnScrollStateChangedListener,
         View.OnTouchListener , ViewSwitcher.ViewFactory,
         ProgressiveRatingBar.OnUserRateListener, PreviewList.PreviewHolder,
         View.OnLayoutChangeListener, AdapterView.OnItemClickListener,
@@ -134,7 +137,7 @@ public class GalleryDetailActivity extends AbstractActivity
     private MaterialProgress mPreviewWait;
     private SuperButton mPreviewRefresh;
 
-    private ScrollView mDetailScroll;
+    private ResponedScrollView mDetailScroll;
     private ScrollView mMoreDetailScroll;
     private View mMoreComment;
 
@@ -289,7 +292,7 @@ public class GalleryDetailActivity extends AbstractActivity
         actionBar.setDisplayHomeAsUpEnabled(true);
 
         // Get view
-        mDetailScroll = (ScrollView)findViewById(R.id.detail_scroll);
+        mDetailScroll = (ResponedScrollView)findViewById(R.id.detail_scroll);
         mMoreDetailScroll = (ScrollView)findViewById(R.id.more_detail_scroll);
         mMoreComment = findViewById(R.id.more_comment);
         mRefreshText = (RefreshTextView)findViewById(R.id.refresh_text);
@@ -399,6 +402,7 @@ public class GalleryDetailActivity extends AbstractActivity
         mDetailComment.setOnTouchListener(this);
         mMoreDetailScroll.addOnLayoutChangeListener(this);
         mDetailScroll.addOnLayoutChangeListener(this);
+        mDetailScroll.setOnScrollStateChangedListener(this);
         mCommentList.addOnLayoutChangeListener(this);
         mPreviewPage.setOnClickListener(this);
         mPreviewBack.setOnClickListener(this);
@@ -987,6 +991,17 @@ public class GalleryDetailActivity extends AbstractActivity
         mPreviewRefresh.setVisibility(View.VISIBLE);
     }
 
+    @Override
+    public void onScrollStateChanged(ResponedScrollView view, int state) {
+        if (view == mDetailScroll) {
+            ImageCache imageCache = ImageCache.getInstance(this);
+            if (state == ResponedScrollView.SCROLL_START)
+                imageCache.setPauseDiskCache(true);
+            else
+                imageCache.setPauseDiskCache(false);
+        }
+    }
+
     private class GDetailGetListener
             implements EhClient.OnGetGDetailListener {
         @Override
diff --git a/src/com/hippo/ehviewer/widget/ResponedScrollView.java b/src/com/hippo/ehviewer/widget/ResponedScrollView.java
new file mode 100644
index 000000000..03b8710ff
--- /dev/null
+++ b/src/com/hippo/ehviewer/widget/ResponedScrollView.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2014 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.widget;
+
+import android.annotation.SuppressLint;
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.ScrollView;
+
+public class ResponedScrollView extends ScrollView {
+
+    public static final int SCROLL_START = 0x0;
+    public static final int SCROLL_END = 0x1;
+
+    public static final long CHECK_DELAY = 100L;
+
+    private boolean isPosted = false;
+    private int mLastScrollY;
+    private OnScrollStateChangedListener mListener;
+
+    public ResponedScrollView(Context context) {
+        super(context);
+    }
+
+    public ResponedScrollView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ResponedScrollView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    public void setOnScrollStateChangedListener(OnScrollStateChangedListener l) {
+        mListener = l;
+    }
+
+    private void wakeScrollObserver() {
+        mLastScrollY = getScrollY();
+        postDelayed(mScrollObserver, CHECK_DELAY);
+        isPosted = true;
+    }
+
+    @Override
+    @SuppressLint("ClickableViewAccessibility")
+    public boolean onTouchEvent(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_UP && !isPosted) {
+            wakeScrollObserver();
+            if (mListener != null)
+                mListener.onScrollStateChanged(this, SCROLL_START);
+        }
+        return super.onTouchEvent(ev);
+    }
+
+    private final Runnable mScrollObserver = new Runnable() {
+        @Override
+        public void run() {
+            int newScrollY = getScrollY();
+            if(newScrollY == mLastScrollY) {
+                isPosted = false;
+                if (mListener != null)
+                    mListener.onScrollStateChanged(ResponedScrollView.this, SCROLL_END);
+            } else {
+                wakeScrollObserver();
+            }
+        }
+    };
+
+    public interface OnScrollStateChangedListener {
+        public void onScrollStateChanged(ResponedScrollView view, int state);
+    }
+}