This is happening in Mint 13 Mate 64bit. It also happens in a clean install (with current updates applied) running under VirtualBox. Do we have a new bug? Is there something I need to do? Am I just an unlucky loner out in the wilderness by myself?The panel encountered a problem while loading "OAFIID:MATE_mintMenu".
If it matters, my computer has an Ivy Bridge CPU (i5-3550), and I installed the Linux 3.4.3-030403-generic (x86_64) kernel because of system freeze problems. That worked, by the way.
EDIT: The error also occurs in Mint 13 Mate 64bit when running the live disk as a VirtualBox guest. It does not occur when running the Mint 13 Mate 32bit live disk as a VirtualBox guest. The 'Main Menu' and 'Menu Bar' options work and are basically the same; also the Drawer is another option, so it's not like it is a critical problem.