I fixed this installing vmware-any-any-update108, downloadable from vmware patch site. Vmware drivers are not yet 2.6.20 compatible.
-- vmware does not run on feisty because of assertion failure in libxcb https://launchpad.net/bugs/99560 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
