I had this happen with myself one time when I didn't select wipe data in ROM manager when doing a manual restore of CM6 over another ROM.. I then used RM and installed fresh CM6 making sure I selected the wipe option and the problem didn't happen when installing the theme thru recovery.
BTW, you should never have to wipe when applying my themes over the correct ROM.
Well, see... that's weird, because I did wipe data/cache before installing a fresh CM6 ROM from RomManager. Would the selected launcher (I selected Launcher2 for the record) or selecting gapps have any effect on this?
Thanks for taking the time to respond! I'd REALLY like to get this theme working! I can't stand the stock look! I'm currently running kangerade and love the look, but there are a few instabilities with the ROM, hence why I'm trying to get CM6 themed so I can stand looking at it...Hahahaha!