Hmmm, I'm beginning to think something else is causing the problem.
It's the display picture enlargement feature from stuffplug-ng. I found this out by setting a bigger picture than 96x96 as my dp and MSN started to crash with everyone i was talking to.
That contact had probably an enlarged dp set and that was causing msn to crash. I switched off the dp's of contacts, tried to talk to that contact with the weird characters and success.
I guess this topic doesn't belong here than. I'll report it on the stuffplug forums.
Sorry to bother you guys about it.
[edit]I downloaded the
new beta version of stuffplug-ng and that seemed to slove it. The contact had indeed a dp from different dimensions.[/edit]