Spring RTS Engine

Hi
I have a NVidia GeForce 9800 GT with two screens installed on it (both at 1680x1050) and alight side by side with the default display to the right (the game runs only on one screen). When the game is started the first time everything is fine, but after alt+tab-ing every time i try to scroll to the left the mouse leaves the game and goes to the next screen.
This bug was not present in 0.77b5

thanks

Its been like that for me since .75
Dunno if its springs fault, other games did it for me too, like spore

Yes, here too. I dont know since which version but I know this bug well (too well). BTW World of Goo does it too