ALT+TAB = Game Crash

I've hit this issue a few times too.  Usually it says something about Direct X and crashes.

I can confirm this error happens for me as well. In case it is of interest, I'm using an nVidia GTX 260 card with the 258.96 driver set in Windows 7 64 bit.

yup same for me, ati 5780 and windows 7 64 bit

Same thing here, Vista 64-bit and Nvidia 9800GX2. Am going to update to the 258 series drivers but apparently that does not help.

I can replicate the issue on a few systems with various graphics cards -- all are windows 7. Based on the debug info in the text file it looks like it is drawing a frame on a back buffer and when it goes to flip the buffer to present it to the user for viewing it has no surface to draw on (game lost focus and is no longer active) and as such it crashes. I am sure watching for the game having focus and sleeping when not in focus would resolve the problem. Garbage Collection is also really a problem with the game. It seems like a lot of objects are not being disposed of correctly when no longer in use. 

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DebugMessage:  Error flipping back buffer to primary buffer.

DebugMessage:  Device lost

Debug Message:  ResourceManager::Invalidate

If you're experiencing alt-tab issues and can live without edge scrolling, running the game in windowed mode at your desktop resolution should provide much better stability (while otherwise appearing the same as fullscreen) while we work the issue.

Note, the same error gets set of by my standard issue windows screen-saver

I posted this in another thread, but it's the same issue, so I'll post it here too.

Same alt-tab issue, nvidia 8800gts, core 2 duo 2.4ghz laptop; Full screen of course, window mode fixes it but it takes a performance hit for me.

http://pastebin.ca/1926966

I have the same problem...I guess i'll just wait till they patch it and try again...Very excited to play, but I also want the more annoying bugs to be killed first!