I just filed a SR because a part file that rebuilds fine in 2011 does not rebuild properly in 2012. I have included a video of the behavior below.

In addition, I tried using the freeze bar, and CTRL-Q caused the earlier features to fail, and it seemed to rebuild the whole thing. Is CTRL-Q supposed to ignore the freeze bar?

Sorry, the model is proprietary, and I cannot upload it to the general forum. It is attached under SR # 1-2137268202