Just reporting a segfault is not very usable for the developers. A segfault gives no hint why it accrued and how it might be reproduced.

To help the developers, please debug your segfault. Go to your gajim folder:

cd src
gdb python
run gajim.py

Report the important output in a ticket. To make it better readable but it between the following tags.

{{{ }}}

To gain additional information during the GDB debugging, run

bt

It may happen that the debugging symbols have been stripped out of your binaries at compile time. If you do not want to recompile python, gajim and maybe even gtk+, give us at least the following output.

strace ./gajim.py

Please state what architecture (amd64, i386, etc..) and what distribution you are using

PS. (no need to read it) Here is a nice article for getting info out of statically linked backtraces