Comment 17 for bug 946674

I've been trying some possibilities and I think I found the trigger of the bug in my system.

The idea is that the bug appears when the "default" user of the login screen uses a wallpaper DIFFERENT from the default one. This means that the bug won't appear if a user has changed the wallpaper but the default user (last logged) has the default one (for example, the guest). I checked that when I restore the default wallpaper in one user the bug doesn't happen for that user anymore.

When the loop crash happens, if I try to change using the arrows to a user with a changed wallpaper the loop keeps happening, so it enforces my theory. It is when you manage to select a user with the default wallpaper that the loop stops. When stopped, I can select a user with a different wallpaper without any problem.

And remember that by default wallpaper I mean ONLY the main default wallpaper, not the entire set. Choosing any other of the default wallpapers triggers the bug as well, it doesn't have to be downloaded from an external source.