Hmmm...The fact that Gaunab (a well-known member of the German BB community) says he's encountering the same problem suggests that the issue might be related to something as daft as the language settings.
I won't be able to test the hypothesis over the weekend, but I'd recommend reinstalling 11.0.0.8, changing the language settings to anything other than German, and then installing the new patches. Silly, I know, but sillier glitches have been seen.
I would appear that Chaos Dorfs only countenance Akkadian accents. Or, barring that, Texan ones

EDIT: On the
downloads page (i.e.
http://downloads.cyanide-studio.com/dungeonbowl/) I see a new 11.0.1.1 patch. Maybe it addresses the issue?