I very clearly have Adaptive Formatting disabled in my C/C++ options (and to be safe, I also have all of its sub-options disabled). However, I just had a C++ file that I opened and as soon as I started typing, the Adaptive Formatting dialog came up, asking if I wanted to apply some formatting change. Unfortunately, because I wasn't expecting the dialog, I hit Enter and skipped right through it, so I couldn't tell you what change it was proposing. I think this may have happened once before for me also, where a C++ file caused Adaptive Formatting to activate, even though it's supposed to be disabled. Sorry I don't have any more details, but as I said, I was typing and not expecting the dialog, so skipped right on through. Needless to say, though, it seems like a bug for Adaptive formatting to try to do anything when I have it turned off.
-Evan