Play Skyrim while logged into steam friends.
Go to any NPC and press E to open a dialogue with the NPC.
Receive a message from a friend on steam.
Press shift-tab to open the steam overlay.
Respond to message.
Press shift-tab to go back to the game.
Result: TAB key no longer works as intended in Skyrim, meaning you cannot exit the NPC menu.
Temporary resolution: Restart game.
BUG 2
Die while transitioning to another area and the game auto saves.
Result: Stuck in endless die and reload loop.
Resolution: load an earlier save and potentially lose alot of progress.
BUG 3:
Small thing really, but the mouse buttons were configured the oposite way round when I started a fresh game.
Hope these get fixed
Thanks
Chris