gaim segfault while blocking someone

[Petr Janda <elekktretterr@xxxxxxxxxxxxxx>]

When I try to block someone in gaim, i get this error:

*gaim in free(): error: modified (page-) pointerAbort*

The user is blocked, but everytime i would log in into msn it would 
segfault with the same error.

Can anyone explain to me what this error means and whats the cause of it?

Petr