When windowed, I can alt+tab without the game breaking, but if I'm in fullscreen mode, alt+tabbing prevents me from re-entering the game. Task Manager also says it is 'Not responding'.

Any way to fix this?

Hi,

I know what you mean, but unfortunately a solution to prevent this sort of crashing isn't found yet. The Problem is, there is no "log"-info in the siege.log after that issue.