--- a/E5Gui/E5SideBar.py	Wed Oct 03 15:34:18 2012 +0200
+++ b/E5Gui/E5SideBar.py	Wed Oct 03 16:38:44 2012 +0200
@@ -492,6 +492,7 @@
         
         data = QByteArray()
         stream = QDataStream(data, QIODevice.WriteOnly)
+        stream.setVersion(QDataStream.Qt_4_6)
         
         stream.writeUInt16(self.Version)
         stream.writeBool(self.__minimized)
@@ -524,6 +525,7 @@
         
         data = QByteArray(state)
         stream = QDataStream(data, QIODevice.ReadOnly)
+        stream.setVersion(QDataStream.Qt_4_6)
         stream.readUInt16()  # version
         minimized = stream.readBool()