[BUG] Most frequent threading mistakes?

I didn't dig too deep in the source code, and believe its not ocaml but the 
libgtk bindings, I'm still looking in the issue. Though I'm goign to ask 
prematurely to see if anyone knows so it could save some research in code.

is this a issue like explained in... (link below)?
http://www.mail-archive.com/[e-mail]/msg37497.html

dross@dfbsd0:~> lablgtk2
Fatal error 'siglongjmp()ing between thread contexts is undefined by POSIX 
1003.1' at line ?in file /usr/src/lib/libc_r/uthread/uthread_jmp.c (errno = ?)
Abort (core dumped)
dross@dfbsd0:~>

Thanks in Adv.