
 * The gtk karaoke widget / data has a large memory leak
   (since ages :-(

 * Need to double click the buttons on dialog boxes, while first click
   moves the dialog - very strange

 * The OpenGL displayer generates a SegFault on shutdown. The error
   is not really debugable, because the debugger just shows one line in libGL.

 * Sometimes the SDL diplayer just locks, so it doesn't process any more
   user events. Debug shows it is still running...????