I can confirm that I have this issue.

For me, I can take the phone out of my pocket (in portrait orientation) and the phone flips quickly to landscape then back to portrait. The UI takes a second to rotate back to portrait-- THEN I can answer a call. A few times while the screen was flipping I have accidentally hit reject, so now I just remember to wait for the rotation-storm to quiet down.

A fix for this would be nice-- as this seems to be my only major bug with PR1.2 as of yet.
This issue wasn't present in PR1.1.1 on my device, either.

At least this isn't a showstopper bug, just a minor annoyance...