Comment 19 for bug 429322

It appears that the agent is getting an X error during initialisation.

My best guess is the steps are:
1. An X error is received while calling seahorse_gtkstock_init()
2. This triggers seahorse_agent_uninit() to be called as the application exits
3. Somewhere in the uninit (the trace doesn't seem to have worked for this part of the stack) a gconf key is set
4. Which hits an assertion in the orbit layer below gconf, perhaps due to being unable to contact X

If you are getting this problem please look in /var/log/Xorg.0.log for any error messages at the bottom and attach them if you do have this problem. Also please note if the problem always occurs or only on some logins.

I've tried reproducing this on my login and a guest login and I am not getting the problem.