Dan Winship <danw@NetBSD.org> dixit :

> What OS are you on? Lots of gtk/gnome apps in the past have had 
> problems with debug printfs that don't check for NULL arguments, 
> because that doesn't cause a problem on Linux (or BSD for that
> matter), but it will crash in the guts of printf on Solaris (and
> probably Irix and anything else non-glibc/bsd-based).

NetBSD 2.0C (current).

I see indeed a _lot_ of "Warning, chunk is already free" when the
program seeks a message (but it seems to come out of GTK2, not libc),
but none of these warnings actually crash. The reason must be something
else. I'll try to debug it out.

Thanks a lot !
Vincent