diff --git a/src/adaptors/UBCFFSubsetAdaptor.cpp b/src/adaptors/UBCFFSubsetAdaptor.cpp
index aeb0a2a8..877a93a0 100644
--- a/src/adaptors/UBCFFSubsetAdaptor.cpp
+++ b/src/adaptors/UBCFFSubsetAdaptor.cpp
@@ -1039,7 +1039,6 @@ bool UBCFFSubsetAdaptor::UBCFFSubsetReader::persistScenes()
                 UBThumbnailAdaptor::persistScene(mProxy->persistencePath(), tmpScene, i);
                 delete tmpScene;
 
-
         mCurrentScene->setModified(false);
     }
 
diff --git a/src/board/UBBoardController.cpp b/src/board/UBBoardController.cpp
index d18b53ac..2ca0fe6d 100644
--- a/src/board/UBBoardController.cpp
+++ b/src/board/UBBoardController.cpp
@@ -777,6 +777,12 @@ void UBBoardController::downloadFinished(bool pSuccess, QUrl sourceUrl, QString
 {
     QString mimeType = pContentTypeHeader;
 
+    // In some cases "image/jpeg;charset=" is retourned by the drag-n-drop. That is
+    // why we will check if an ; exists and take the first part (the standard allows this kind of mimetype)
+    int position=mimeType.indexOf(";");
+    if(position != -1)
+        mimeType=mimeType.left(position);
+
     if (!pSuccess)
     {
         UBApplication::showMessage(tr("Downloading content %1 failed").arg(sourceUrl.toString()));
diff --git a/src/gui/UBDocumentTreeWidget.cpp b/src/gui/UBDocumentTreeWidget.cpp
index 7f06d5d2..b344855c 100644
--- a/src/gui/UBDocumentTreeWidget.cpp
+++ b/src/gui/UBDocumentTreeWidget.cpp
@@ -25,6 +25,10 @@
 #include "core/UBDocumentManager.h"
 #include "document/UBDocumentController.h"
 
+#include "adaptors/UBThumbnailAdaptor.h"
+#include "adaptors/UBSvgSubsetAdaptor.h"
+#include "frameworks/UBFileSystemUtils.h"
+
 #include "core/memcheck.h"
 
 UBDocumentTreeWidget::UBDocumentTreeWidget(QWidget * parent)
@@ -290,7 +294,14 @@ void UBDocumentTreeWidget::dropEvent(QDropEvent *event)
                             }
 
                             UBPersistenceManager::persistenceManager()->insertDocumentSceneAt(targetDocProxy, sceneClone, targetDocProxy->pageCount());
-                        }
+
+                            //due to incorrect generation of thumbnails of invisible scene I've used direct copying of thumbnail files
+                            //it's not universal and good way but it's faster
+                            QString from = sourceItem.documentProxy()->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", sourceItem.sceneIndex() + 1);
+                            QString to  = targetDocProxy->persistencePath() + UBFileSystemUtils::digitFileFormat("/page%1.thumbnail.jpg", targetDocProxy->pageCount());
+                            QFile::remove(to);
+                            QFile::copy(from, to);
+                          }
                     }
 
                     QApplication::restoreOverrideCursor();
diff --git a/src/gui/UBDocumentTreeWidget.h b/src/gui/UBDocumentTreeWidget.h
index ab2e9866..f76d1696 100644
--- a/src/gui/UBDocumentTreeWidget.h
+++ b/src/gui/UBDocumentTreeWidget.h
@@ -23,7 +23,7 @@ class UBDocumentProxyTreeItem;
 
 class UBDocumentTreeWidget : public QTreeWidget
 {
-    Q_OBJECT;
+    Q_OBJECT
 
     public:
         UBDocumentTreeWidget(QWidget *parent = 0);
diff --git a/src/gui/UBThumbnailView.h b/src/gui/UBThumbnailView.h
index ecd13a19..32390f1a 100644
--- a/src/gui/UBThumbnailView.h
+++ b/src/gui/UBThumbnailView.h
@@ -22,7 +22,7 @@ class UBGraphicsScene;
 
 class UBThumbnailView : public QGraphicsView
 {
-    Q_OBJECT;
+    Q_OBJECT
 
     public:
         UBThumbnailView();