This is probably not going to be of much help, but someone should write something?
First of all check messages in /var/log.
I use KDE so I don't know what your applications are.
However, the first thing I do when things like this happen is to launch the applications through a console.
That way you often get messages that would otherwise be invisible and sometimes you can give arguments as well.
I have never had a kernel panic in Sabayon so I don't know if there is a setting to automatically reboot if it happens, but it certainly sounds like it.
If so it's probably a memory problem of some kind, maybe a corrupt library...
-Are you really, really sure your RAM is 100% OK?