Other Time, new Error.
Whenever I activate Undo comes the following error message
(http://www.fotos-hochladen.net/uploads/bugcentredlnoufxwc78.png)
Sry Hitman...
I'll take a look at this as well. See: http://redmine.aksdb.de/issues/88
Please consider directly posting bug reports in the bug tracker. Thanks again for your feedback :-)