Thanks for reporting this. It seems compiz-fusion-plugins-main may be a culprit as well. What is the output of:
apt-cache policy compiz-fusion-plugins-main ** Changed in: update-manager (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/779215 Title: Upgrading from maverick to natty fails due to "resolve generated breaks" error -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs