!joke locking up

[szrof]

The bot just decided to get stuck while telling a joke:

11:09 @<Szrof> !joke
11:09 @<Elyvilon> Did you hear the one about from oblivion in comparison to morrowind: actual game balance and non-boring high level?

After that, nothing was said any more, but the bot is still thinking it's telling a joke:

11:18 @<Szrof> !joke
11:18 @<Elyvilon> I'm sorry, but can't you see I'm already telling a joke?!

The log shows the following (+d, but not +12345):

[12:09] (d)bMotion: abstract sillyThings has been unloaded, reloading...
[12:09] (d)bMotion: Shrunk abstract sillyThings by 84 items by de-duping
[12:09] Tcl error [bMotion_event_main]: bad index "4:from oblivion in comparison to morrowind": must be integer or end?-integer?

My hunch is that it has something to do with the colon in the abstract entry (from oblivion in comparison to morrowind: actual game balance and non-boring high level), as the error shows everything up to the colon, but nothing after that.

Rehashing the bot fixed the problem, so it was able to tell jokes once again.