Comment 1 for bug 1167059

I'll just add that I updated a Ubuntu 12.10 x86_64 guest running in current VirtualBox 4.2.10 (on same Ubuntu host as above), also using gnome 3 ppa and the same bug occurs there repeatedly too. However, I have another updated 12.10 x86_64 guest (inc gnome3 ppa) in VB 4.2.10 on a Mac OSX 10.8.3 host and the bug does not occur there (well, it occurred once but I can't repeat it?!).