I'm using Precise and this bug affects me too. This is apparently fixed upstream but the latest version needs to be packaged. A Debian bug report was submitted (http://bugs.debian.org/cgi- bin/bugreport.cgi?bug=677446). Bug 749834 which is a duplicate of this one has additional information.
** Bug watch added: Debian Bug tracker #677446 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=677446 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/608802 Title: NaNs in multiple screens To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/g15stats/+bug/608802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs