diff --git a/rtgui/batchqueue.cc b/rtgui/batchqueue.cc
index 83155f0a2..1708c7445 100644
--- a/rtgui/batchqueue.cc
+++ b/rtgui/batchqueue.cc
@@ -119,9 +119,8 @@ void BatchQueue::addEntries ( std::vector<BatchQueueEntry*> &entries, bool head)
     saveBatchQueue( );
 	}
 
-    arrangeFiles ();
-    queue_draw ();
-    notifyListener ();
+    redraw();
+    notifyListener (false);
 }
 
 bool BatchQueue::saveBatchQueue( )
@@ -206,10 +205,8 @@ void BatchQueue::loadBatchQueue( )
         }
     }
 
-    arrangeFiles ();
-    queue_draw ();
-
-    notifyListener();
+    redraw();
+    notifyListener(false);
 }
 
 Glib::ustring BatchQueue::getTempFilenameForParams( const Glib::ustring filename )
@@ -265,7 +262,7 @@ void BatchQueue::cancelItems (std::vector<ThumbBrowserEntryBase*>* items) {
     }
 
     redraw ();
-    notifyListener ();
+    notifyListener (false);
 }
 
 void BatchQueue::headItems (std::vector<ThumbBrowserEntryBase*>* items) {
@@ -369,7 +366,6 @@ void BatchQueue::startProcessing () {
 }
 
 rtengine::ProcessingJob* BatchQueue::imageReady (rtengine::IImage16* img) {
-    GThreadLock lock;
 
     // save image img
     Glib::ustring fname;
@@ -407,16 +403,14 @@ rtengine::ProcessingJob* BatchQueue::imageReady (rtengine::IImage16* img) {
         if (processing->thumbnail) {
             processing->thumbnail->imageDeveloped ();
             processing->thumbnail->imageRemovedFromQueue ();
-            if (listener)
-                listener->imageProcessingReady (processing->filename);
         }
     }
     // save temporary params file name: delete as last thing
     Glib::ustring processedParams = processing->savedParamsFile;
     
     // delete from the queue
-    delete processing;
-    processing = NULL;
+    delete processing; processing = NULL;
+    bool queueEmptied=false;
 	{
         // TODO: Check for Linux
 #ifdef WIN32
@@ -427,8 +421,7 @@ rtengine::ProcessingJob* BatchQueue::imageReady (rtengine::IImage16* img) {
 
         // return next job
         if (fd.size()==0) {
-            if (listener)
-                listener->queueEmpty ();
+            queueEmptied=true;
         }
         else if (listener && listener->canStartNext ()) {
             BatchQueueEntry* next = (BatchQueueEntry*)fd[0];
@@ -445,7 +438,7 @@ rtengine::ProcessingJob* BatchQueue::imageReady (rtengine::IImage16* img) {
             // remove button set
             next->removeButtonSet ();
         }
-        if( saveBatchQueue( ) ){
+        if (saveBatchQueue( )) {
             safe_g_remove( processedParams );
             // Delete all files in directory \batch when finished, just to be sure to remove zombies
             if( fd.size()==0 ){
@@ -460,7 +453,7 @@ rtengine::ProcessingJob* BatchQueue::imageReady (rtengine::IImage16* img) {
     }
 
     redraw ();
-    notifyListener ();
+    notifyListener (queueEmptied);
 
     return processing ? processing->job : NULL;
 }
@@ -622,21 +615,23 @@ void BatchQueue::buttonPressed (LWButton* button, int actionCode, void* actionDa
 struct NLParams {
     BatchQueueListener* listener;
     int qsize;
+    bool queueEmptied;
 };
 
 int bqnotifylistenerUI (void* data) {
     NLParams* params = (NLParams*)data;
-    params->listener->queueSizeChanged (params->qsize);
+    params->listener->queueSizeChanged (params->qsize, params->queueEmptied);
     delete params;
     return 0;
 }
 
-void BatchQueue::notifyListener () {
+void BatchQueue::notifyListener (bool queueEmptied) {
 
     if (listener) {
         NLParams* params = new NLParams;
         params->listener = listener;
         params->qsize = fd.size();
+        params->queueEmptied = queueEmptied;
         g_idle_add (bqnotifylistenerUI, params);
     }
 }
diff --git a/rtgui/batchqueue.h b/rtgui/batchqueue.h
index 2cf9b6870..33e0d27e4 100644
--- a/rtgui/batchqueue.h
+++ b/rtgui/batchqueue.h
@@ -28,9 +28,7 @@
 class BatchQueueListener {
 
     public:
-        virtual void queueSizeChanged     (int qsize) =0;
-        virtual void imageProcessingReady (Glib::ustring fname) =0;
-        virtual void queueEmpty           () =0;
+        virtual void queueSizeChanged     (int qsize, bool queueEmptied) =0;
         virtual bool canStartNext         () =0;
 };
 
@@ -57,7 +55,7 @@ class BatchQueue  : public ThumbBrowserBase,
     Glib::ustring autoCompleteFileName (const Glib::ustring& fileName, const Glib::ustring& format);
     Glib::ustring getTempFilenameForParams( const Glib::ustring filename );
     bool saveBatchQueue( );
-    void notifyListener ();
+    void notifyListener (bool queueEmptied);
 
   public:
     BatchQueue ();
diff --git a/rtgui/batchqueuepanel.cc b/rtgui/batchqueuepanel.cc
index 997e6f79f..a0f49b01c 100644
--- a/rtgui/batchqueuepanel.cc
+++ b/rtgui/batchqueuepanel.cc
@@ -179,14 +179,17 @@ void BatchQueuePanel::updateTab (int qsize)
     }
 }
 
-void BatchQueuePanel::queueSizeChanged (int qsize)
+void BatchQueuePanel::queueSizeChanged (int qsize, bool queueEmptied)
 {
 	updateTab ( qsize);
-}
 
-void BatchQueuePanel::imageProcessingReady (Glib::ustring fname) {
+    if (queueEmptied) {
+        stopBatchProc ();
+        fdir->set_sensitive (true);
+        fformat->set_sensitive (true);
 
-    parent->imageDeveloped (fname);
+        SoundManager::playSoundAsync(options.sndBatchQueueDone);
+    }
 }
 
 void BatchQueuePanel::startBatchProc () {
@@ -201,11 +204,12 @@ void BatchQueuePanel::startBatchProc () {
     if (batchQueue->hasJobs()) {
         fdir->set_sensitive (false);
         fformat->set_sensitive (false);
-	saveOptions();
+        saveOptions();
         batchQueue->startProcessing ();
     }
     else 
         stopBatchProc ();
+
     updateTab (batchQueue->getEntries().size());
 }
 
@@ -228,15 +232,6 @@ void BatchQueuePanel::addBatchQueueJobs ( std::vector<BatchQueueEntry*> &entries
         startBatchProc ();
 }
 
-void BatchQueuePanel::queueEmpty () {
-
-    stopBatchProc ();
-    fdir->set_sensitive (true);
-    fformat->set_sensitive (true);
-
-    SoundManager::playSoundAsync(options.sndBatchQueueDone);
-}
-
 bool BatchQueuePanel::canStartNext () {
 
     if (start->get_active ())
diff --git a/rtgui/batchqueuepanel.h b/rtgui/batchqueuepanel.h
index 605834d28..b170ef650 100644
--- a/rtgui/batchqueuepanel.h
+++ b/rtgui/batchqueuepanel.h
@@ -57,9 +57,7 @@ class BatchQueuePanel : public Gtk::VBox,
         void addBatchQueueJobs (std::vector<BatchQueueEntry*> &entries , bool head=false);
 
         // batchqueuelistener interface
-        void queueSizeChanged     (int qsize);
-        void imageProcessingReady (Glib::ustring fname);
-        void queueEmpty           ();
+        void queueSizeChanged     (int qsize, bool queueEmptied);
         bool canStartNext         ();
         
         void startBatchProc ();
diff --git a/rtgui/filebrowser.cc b/rtgui/filebrowser.cc
index fc7271998..c71f83fa4 100644
--- a/rtgui/filebrowser.cc
+++ b/rtgui/filebrowser.cc
@@ -970,7 +970,7 @@ int refreshThumbImagesUI (void* data) {
 }
 
 void FileBrowser::_thumbRearrangementNeeded () {
-    refreshThumbImages ();
+    refreshThumbImages ();  // arrangeFiles is NOT enough
 }
 
 void FileBrowser::thumbRearrangementNeeded () {
diff --git a/rtgui/filebrowserentry.cc b/rtgui/filebrowserentry.cc
index 8d24e56b7..66c8c0f7b 100644
--- a/rtgui/filebrowserentry.cc
+++ b/rtgui/filebrowserentry.cc
@@ -239,7 +239,7 @@ void FileBrowserEntry::_updateImage (rtengine::IImage8* img, double s, rtengine:
         if (rotated)
             parent->thumbRearrangementNeeded();
         else if (redrawRequests==0) 
-        parent->redrawNeeded (this);
+            parent->redrawNeeded (this);
     }
 }
 
diff --git a/rtgui/filecatalog.cc b/rtgui/filecatalog.cc
index 5282c1005..e6228793c 100644
--- a/rtgui/filecatalog.cc
+++ b/rtgui/filecatalog.cc
@@ -641,17 +641,14 @@ void FileCatalog::previewsFinished (int dir_id) {
 }
 
 void FileCatalog::setEnabled (bool e) {
-
     enabled = e;
 }
 
 void FileCatalog::redrawAll () {
-
     fileBrowser->queue_draw ();
 }
 
-void FileCatalog::refreshAll () {
-
+void FileCatalog::refreshThumbImages () {
     fileBrowser->refreshThumbImages ();
 }
 
diff --git a/rtgui/filecatalog.h b/rtgui/filecatalog.h
index 84a814e80..2cacebd4e 100644
--- a/rtgui/filecatalog.h
+++ b/rtgui/filecatalog.h
@@ -177,12 +177,13 @@ class FileCatalog : public Gtk::VBox,
 				// filterpanel interface
 				void exifFilterChanged ();
 				
-       Glib::ustring lastSelectedDir () { return selectedDirectory; }
+				Glib::ustring lastSelectedDir () { return selectedDirectory; }
                 void setEnabled (bool e);   // if not enabled, it does not open image
                 void enableTabMode(bool enable);  // sets progress bar
 
+                // accessors for FileBrowser
                 void redrawAll ();
-                void refreshAll ();
+                void refreshThumbImages ();
                 void refreshHeight ();
                 
                 void openRequested          (std::vector<Thumbnail*> tbe);
diff --git a/rtgui/filepanel.cc b/rtgui/filepanel.cc
index b34279f27..15c70afd3 100644
--- a/rtgui/filepanel.cc
+++ b/rtgui/filepanel.cc
@@ -217,7 +217,7 @@ bool FilePanel::addBatchQueueJobs ( std::vector<BatchQueueEntry*> &entries ) {
 void FilePanel::optionsChanged () {
 
     tpc->optionsChanged ();
-    fileCatalog->refreshAll ();
+    fileCatalog->refreshThumbImages ();
 }
 
 bool FilePanel::handleShortcutKey (GdkEventKey* event) {
diff --git a/rtgui/rtwindow.cc b/rtgui/rtwindow.cc
index 74f1dd005..d79f95ea5 100644
--- a/rtgui/rtwindow.cc
+++ b/rtgui/rtwindow.cc
@@ -331,11 +331,6 @@ bool RTWindow::keyPressed (GdkEventKey* event) {
     return false;
 }
 
-void RTWindow::imageDeveloped (Glib::ustring fname) {
-
-//    fpanel->refreshThumbnail (fname);
-}
-
 void RTWindow::addBatchQueueJob (BatchQueueEntry* bqe, bool head) {
 
 	std::vector<BatchQueueEntry*> entries;
diff --git a/rtgui/rtwindow.h b/rtgui/rtwindow.h
index 07c6b5ee4..f1756bb58 100644
--- a/rtgui/rtwindow.h
+++ b/rtgui/rtwindow.h
@@ -60,7 +60,6 @@ class RTWindow : public Gtk::Window, public rtengine::ProgressListener{
         bool on_window_state_event(GdkEventWindowState* event);
         void on_mainNB_switch_page(GtkNotebookPage* page, guint page_num);
 
-        void imageDeveloped (Glib::ustring fname); // called by the batchqueue when it finishes an image
         void showPreferences ();
         void on_realize ();
         void toggle_fullscreen ();
diff --git a/rtgui/thumbbrowserentrybase.cc b/rtgui/thumbbrowserentrybase.cc
index 8f887fe7b..ccd82235b 100644
--- a/rtgui/thumbbrowserentrybase.cc
+++ b/rtgui/thumbbrowserentrybase.cc
@@ -60,7 +60,7 @@ void ThumbBrowserEntryBase::updateBackBuffer () {
     backBuffer = Gdk::Pixmap::create (w->get_window(), exp_width, exp_height);
 
     // If thumbnail is hidden by a filter drawing to it will crash
-    int backbuffer_w =0, backbuffer_h  = 0;
+    int backbuffer_w=0, backbuffer_h=0;
     backBuffer->get_size(backbuffer_w, backbuffer_h);
     // if either with or height is zero then return early
     if (backbuffer_w * backbuffer_h == 0) return;
@@ -338,23 +338,19 @@ void ThumbBrowserEntryBase::drawFrame (Cairo::RefPtr<Cairo::Context> cr, const G
 
 void ThumbBrowserEntryBase::draw () {
 
-    if (!drawable)
+    if (!drawable || !parent)
         return;
 
-    Glib::RWLock::ReaderLock l(lockRW);
+    Glib::RWLock::ReaderLock l(lockRW);  // No resizes, position moves etc. inbetween
 
     int bbWidth, bbHeight;
     if (backBuffer)
         backBuffer->get_size (bbWidth, bbHeight);
-    
 
     if (!backBuffer || selected!=bbSelected || framed!=bbFramed || preview!=bbPreview 
         || exp_width!=bbWidth || exp_height!=bbHeight || getIconsOnImageArea ()!=bbIcons)
         updateBackBuffer ();
 
-    if (!parent)
-        return;
-        
     Gtk::Widget* w = parent->getDrawingArea ();
 
     Glib::RefPtr<Gdk::GC> gc_ = Gdk::GC::create (w->get_window());
diff --git a/rtgui/thumbbrowserentrybase.h b/rtgui/thumbbrowserentrybase.h
index 637b2dc9c..a9eaf2737 100644
--- a/rtgui/thumbbrowserentrybase.h
+++ b/rtgui/thumbbrowserentrybase.h
@@ -53,7 +53,7 @@ protected:
     int width;      // minimal width
     int height;     // minimal height
 // set by arrangeFiles() of thumbbrowser
-    int exp_width;  // arranged width
+    int exp_width;  // arranged width (backbuffer dimensions)
     int exp_height; // arranged height
     int startx;     // x coord. in the widget
     int starty;     // y coord. in the widget
@@ -72,6 +72,7 @@ protected:
     void drawFrame (Cairo::RefPtr<Cairo::Context> cr, const Gdk::Color& bg, const Gdk::Color& fg);
     void getTextSizes (int& w, int& h);
     
+    // called during updateBackBuffer for custom overlays
     virtual void customBackBufferUpdate (Cairo::RefPtr<Cairo::Context> c) {}
     
   public: