Anytime I create an active rigid body, I get warning message when I rewind playback. I know there's nothing wrong with my geo and setups etc. It's just an annoying message that always pops up. I can turn it off but was just curious if anyone elses version of Maya does this. I get the same kind of warning messages on other Non-problematic actions too. It's just that everytime I see those messages pop up, it makes me think I did something wrong, even though I didn't.
Don't be satisfied with what you can do but rather strive to do the things you can't do!