Ok... I had the crashes and freezes... but yesterday TF2 went totally crazy:
Twice the game just tabbed back to windows without me being any near of a possible key-kombination for this.
Around 3-4 times I had wrong player coloration and/or models: demm as red medic in blu team, enemy had a pyro healing instead of medic and there was a red scout shown as spy cloaked as pyro in mah blu team. o_O
(This was really confusing as I always wanted to burn him...
)
Which looks a little bit to the fancy resupply cabinet which I had 2 months ago:
