I ran iTunes on its own video, and audio this morning and the CPU never went over 38 degrees C.
Carressa,
I know your probably getting tired of these tests, but could you please do the following just to remove any doubt.
1) Close all programs except iTunes.
2) Play audio in iTunes for at least 10 mins.
3) After 10 mins of ONLY playing audio in iTunes, check the CPU temp.
Your temp should be at or near it's idle temp (30C +/-)
If your temp is closer to 50C, then that would be an indication that the Mac Pro power management bug is also affecting i5/i7 iMacs.
Thanks for your time!! We do appreciate it...