Reinstalling the OS worked out fine! The report crash massages stopped completely. Thanks!
Unfortunatly though a new problem has rissen. My online mass storage account (Hubic) constantly (about once per second) shows massages in the Console. See this log:
06-07-16 22:29:59,276 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:29:59,277 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:29:59,277 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:02,405 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:02,405 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:02,406 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:02,406 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:02,406 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:02,406 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:06,104 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:06,104 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:06,104 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:06,105 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:06,105 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:06,105 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:08,143 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:08,143 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:08,143 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:08,144 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:08,144 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:08,144 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:10,433 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:10,434 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:10,434 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:10,435 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:10,435 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:10,435 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:22,357 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:22,357 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:22,358 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:22,358 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:22,358 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:22,359 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:26,080 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:26,081 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:26,081 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:26,081 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:26,081 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:26,081 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:28,139 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:28,139 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:28,139 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:28,140 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:28,140 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:28,140 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:29,072 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:29,072 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:29,072 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:29,073 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:29,073 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:29,073 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:32,671 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:32,671 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:32,672 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:32,672 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:32,672 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:32,672 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:56,258 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:56,258 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:56,258 hubiC[426]: CGSGetWindowBounds
06-07-16 22:30:56,258 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:30:56,258 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:30:56,258 hubiC[426]: CGSGetWindowBounds
06-07-16 22:31:39,103 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:31:39,104 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:31:39,104 hubiC[426]: CGSGetWindowBounds
06-07-16 22:31:39,105 hubiC[426]: CGSGetWindowTransformAtPlacement
06-07-16 22:31:39,105 hubiC[426]: CGSTranslatePointForWindow
06-07-16 22:31:39,105 hubiC[426]: CGSGetWindowBounds
Start up in Safe Mode didn't make any change. Any idea what might cause the problem and how to solve it?