diff --git a/bin/EhViewer.apk b/bin/EhViewer.apk
index 116db69a9..b7e090e7f 100644
Binary files a/bin/EhViewer.apk and b/bin/EhViewer.apk differ
diff --git a/bin/classes.dex b/bin/classes.dex
index 548f74374..976b359d5 100644
Binary files a/bin/classes.dex and b/bin/classes.dex differ
diff --git a/bin/resources.ap_ b/bin/resources.ap_
index e278bed3a..e9ff0a53c 100644
Binary files a/bin/resources.ap_ and b/bin/resources.ap_ differ
diff --git a/res/raw/change_log b/res/raw/change_log
index 7b2743fa3..8f85bf628 100644
--- a/res/raw/change_log
+++ b/res/raw/change_log
@@ -1,5 +1,7 @@
 Version 0.4.3 (2014-??-??)
 * 更丰富的错误提示
+* 禁止多次同时更新
+* 修正由于版本之间数据不同导致的阅读时崩溃
 
 Version 0.4.2 (2014-04-04)
 * 添加内置存储空间或 Sd Card 检测
diff --git a/src/com/hippo/ehviewer/exception/FileException.java b/src/com/hippo/ehviewer/exception/FileException.java
index ce7b7ce70..f314f7377 100644
--- a/src/com/hippo/ehviewer/exception/FileException.java
+++ b/src/com/hippo/ehviewer/exception/FileException.java
@@ -22,4 +22,27 @@ public class FileException extends Exception {
         return mErrorCode;
     }
     
+    
+    // TODO
+    public String getMessage() {
+        switch (mErrorCode) {
+        case MKDIR_ERROR:
+            return "mkdir error";
+        case CREATE_FILE_ERROR:
+            return "create file error";
+        case NOT_DIR:
+            return "it is not a dir";
+        case NOT_FILE:
+            return "it is not a file";
+        case CANNOT_EXECUTE:
+            return "can not execute";
+        case CANNOT_READ:
+            return "can not read";
+        case CANNOT_WRITE:
+            return "can not write";
+        default:
+            return "unknown error";
+        }
+    }
+    
 }
diff --git a/src/com/hippo/ehviewer/gallery/data/ImageSet.java b/src/com/hippo/ehviewer/gallery/data/ImageSet.java
index b328e6e36..e8a74a976 100644
--- a/src/com/hippo/ehviewer/gallery/data/ImageSet.java
+++ b/src/com/hippo/ehviewer/gallery/data/ImageSet.java
@@ -89,15 +89,33 @@ public class ImageSet {
     // [startIndex, endIndex)
     public ImageSet(Context context, String gid, File folder, int size, int startIndex, int endIndex,
             Set<Integer> failIndexSet) {
+        
+        if (folder == null || !folder.isDirectory())
+            size = 0;
+        
+        /*
         if (folder == null)
             throw new IllegalArgumentException("Folder is null");
         if (!folder.isDirectory())
             throw new IllegalArgumentException("Folder is not directory, path is " + folder.getPath());
+        */
+        
+        if (size < 0)
+            size = 0;
+        if (endIndex > size)
+            endIndex = size;
+        if (startIndex < 0)
+            startIndex = 0;
+        if (startIndex > endIndex)
+            startIndex = endIndex;
+        
+        /*
         if (size < 0 || startIndex < 0
                 || startIndex > endIndex || endIndex > size)
             throw new IllegalArgumentException("size or index value error, size = "
                 + size + ", startIndex = " + startIndex
                 + ", endIndex = " + endIndex + ", path is " + folder.getPath());
+        */
         
         mContext = context;
         mGid = gid;
diff --git a/src/com/hippo/ehviewer/network/Downloader.java b/src/com/hippo/ehviewer/network/Downloader.java
index 9cec66240..98ddfa488 100644
--- a/src/com/hippo/ehviewer/network/Downloader.java
+++ b/src/com/hippo/ehviewer/network/Downloader.java
@@ -139,6 +139,9 @@ public class Downloader implements Runnable {
         else if (mException instanceof NoSdCardException)
             return mContext.getString(R.string.em_no_sdcard);
         
+        else if (mException instanceof FileException)
+            return ((FileException)mException).getMessage();
+        
         else
             return mException.getMessage();
     }