
As you can see, I still have a cursor, due to having the popup menu open as the game ended (as per bug #76).
In the second screenshot, my view direction has changed, and there is no way to acheive this while the cursor is up - my view was changed without me doing anything, by some other means (OK, I could have used the arrow keys to turn, but I didn't):

This can happen in the readyroom before or after a game, and does not appear to correlate with any player doing anything in particular (e.g. it doesn't change when somebody joins the game or a team, presses '+use' or uses their flashlight, that I have observed). It does not happen during a game, but came happen in the period between joining a team, and the round starting.
Version 3.2b1