Why does this update corrupt Nikon NEF files?

Per earlier discussions, I reinstalled 4.07 and rebuilt everything. It appears that both Nikon D90 and D7000 Nef's are affected yielding a magenta screen when the thumbnail is clicked and opens in any window.

Will the next RAW update remedy this problem?

I am using a new iMac and it came with Mountain Lion and all updates have always been installed.

Please advise.