you have to change only /System/Library/Extensions/IOUSBMassStorageClass.kext
with one's from MacOSX Update Combo dmg (extract IOUSBMassStorageClass.kext with Pacifist)
do from terminal:
sudo chown -R root:wheel /System/Library/Extensions/IOUSBMassStorageClass.kext
clean cache and reboot.
this is a temporary fix, until apple or cm release an update
