Sometimes when I'm using Audacity and I perform an action (it can be pretty much anything, like deleting, zooming in, etc.), Gnome immediately crashes and restarts, returning me to the login screen.

I tried installing Audacity from the PPA, but the problem persists. Sometimes I use JACK and sometimes I don't, and the crashes occur either way. Gnome never crashes on this computer otherwise. I'm using Ubuntu Studio 10.04. Has anyone experienced this problem, or does anyone know how I can diagnose the issue and solve it? If all else fails, I'll try compiling Audacity from source, but I'd rather not go that far if there's a simpler fix. Thanks!