in a way its reassuring that it's not just me - have tried validating the game cache, deleting client registry to force steam to update, considering deleting local content but might hold off on that as it seems to be a widespread problem and steam cloud seems to be having issues so I don't want to risk saves. EDIT: weirdly, Oblivion has the same problem for me now - have randomly tried football manager as well and that's fine so I'm even more frustrated now