Over the Christmas break I took the plunge and upgraded my Fedora 11 desktop to Fedora 12 (this was after testing the upgrade on my laptop first). Things went seamlessly until I went to run VMware Player 3.0 which was installed pre-upgrade. VMware Player successfully recompiled the kernel modules but kept crashing after the GUI would come up. Thanks to some googleing, forum posts, and a bit of redirection I came across this post. I went for easy route and just added the line:
pref.vmplayer.downloadPermission = “deny”
to ~/.vmware/preferences and the GUI comes up as expected.
Digital Ramblings 