Comment 5 for bug 502237

I found today another feature: two users logged on, user A clicked "Switch User", GDM appears, selected user B, entered pass, clicked ok and got returned to the same session, the one of user A :-)
Tried the same again and this time session from user B crashed and got thrown back to GDM.
Logged user B, switched back to A, tried switching back to B, and again got returned to user A. Returning to the same session after GDM seems to be working, the problem is switching to other users.
And yes, I have to be very, very careful not to leave some applications runnning when switching users because xorg crashes on returning to that session. Mplayer, opengl apps, even flash in browser all greatly increase the chance of a crash.
Had similar problem on 9.04, but there I blamed for this the fast-user-switch-applet and skipped from 8.10 directly to 9.10. And here it is again, cannot switch users. Ubuntu 8.10 works fine, tried all available nvidia drivers, it has to be some xorg based bug/feature.