This type of thing is almost always an issue with a failed upload during the upgrade process. Those labels (cpmm whatever) exist because the language file is missing those entries in a PHP array.
EE language method replacement fails back to the array key when it can't find a key => val pair.
Did you make sure you followed the upgrade instructions exactly? Try reuploading your system folder. I chould tell you the exact file if I was at my desk.