diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 87fb090d68..151d633aa3 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -17,8 +17,8 @@
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  -->
 <manifest package="com.owncloud.android"
-    android:versionCode="103007"
-    android:versionName="1.3.7" xmlns:android="http://schemas.android.com/apk/res/android">
+    android:versionCode="103008"
+    android:versionName="1.3.8" xmlns:android="http://schemas.android.com/apk/res/android">
 
     <uses-permission android:name="android.permission.GET_ACCOUNTS" />
     <uses-permission android:name="android.permission.USE_CREDENTIALS" />
diff --git a/src/com/owncloud/android/files/services/FileUploader.java b/src/com/owncloud/android/files/services/FileUploader.java
index 10f05c488a..f7340f6bcc 100644
--- a/src/com/owncloud/android/files/services/FileUploader.java
+++ b/src/com/owncloud/android/files/services/FileUploader.java
@@ -220,6 +220,7 @@ public class FileUploader extends Service implements OnDatatransferProgressListe
                 availablePath = getAvailableRemotePath(wc, mRemotePaths[i]);
             try {
                 File f = new File(mRemotePaths[i]);
+                long size = localFiles[i].length();
                 parentDirId = storageManager.getFileByPath(f.getParent().endsWith("/")?f.getParent():f.getParent()+"/").getFileId();
                 if(availablePath != null) {
                     mRemotePaths[i] = availablePath;
@@ -227,7 +228,7 @@ public class FileUploader extends Service implements OnDatatransferProgressListe
                     if (wc.putFile(mLocalPaths[i], mRemotePaths[i], mimeType)) {
                         OCFile new_file = new OCFile(mRemotePaths[i]);
                         new_file.setMimetype(mimeType);
-                        new_file.setFileLength(localFiles[i].length());
+                        new_file.setFileLength(size);
                         new_file.setModificationTimestamp(System.currentTimeMillis());
                         new_file.setLastSyncDate(0);
                         new_file.setStoragePath(mLocalPaths[i]);         
diff --git a/src/eu/alefzero/webdav/FileRequestEntity.java b/src/eu/alefzero/webdav/FileRequestEntity.java
index 2a3ba025af..f8ba3204a3 100644
--- a/src/eu/alefzero/webdav/FileRequestEntity.java
+++ b/src/eu/alefzero/webdav/FileRequestEntity.java
@@ -5,6 +5,11 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.FileLock;
+import java.nio.channels.OverlappingFileLockException;
 
 import org.apache.commons.httpclient.methods.RequestEntity;
 
@@ -49,12 +54,19 @@ public class FileRequestEntity implements RequestEntity {
     }
 
     public void writeRequest(final OutputStream out) throws IOException {
-        byte[] tmp = new byte[4096];
+        //byte[] tmp = new byte[4096];
+        ByteBuffer tmp = ByteBuffer.allocate(4096);
         int i = 0;
-        InputStream instream = new FileInputStream(this.file);
+        
+        FileChannel channel = new RandomAccessFile(this.file, "rw").getChannel();
+        FileLock lock = channel.tryLock();
+        //InputStream instream = new FileInputStream(this.file);
+        
         try {
-            while ((i = instream.read(tmp)) >= 0) {
-                out.write(tmp, 0, i);
+            //while ((i = instream.read(tmp)) >= 0) {
+            while ((i = channel.read(tmp)) >= 0) {
+                out.write(tmp.array(), 0, i);
+                tmp.clear();
                 if (listener != null) 
                     listener.transferProgress(i);
             }
@@ -63,7 +75,9 @@ public class FileRequestEntity implements RequestEntity {
             throw new RuntimeException("Ugly solution to workaround the default policy of retries when the server falls while uploading ; temporal fix; really", io);   
             
         } finally {
-            instream.close();
+            //instream.close();
+            lock.release();
+            channel.close();
         }
     }