I have been getting this in every ALT TAB out for a wile now.. i figure i'll report it now.   Any quick advice?

DX:ERROR:Invalid Call

Game crashes

Report Created On 02/17/2011 19:05:42
System Info TOXICXFX
Intel Core2Duo CPU
E8400 @3.00GHz
3.00GHz,2.00GB of RAM (DDR3)
Display
System information
Operating system: Microsoft Windows XP, 32-bit (Service Pack 3)
DirectX version: 9.0
Graphics card information
GeForce 9800 GT
GeForce 9800 GT
Driver version: 260.99
CUDA Cores: 112
Core clock: 600 MHz
Shader clock: 1500 MHz
Memory clock: 900 MHz (1800 MHz data rate)
Memory interface: 256-bit
Memory: 512 MB
Memory type: GDDR3
Video BIOS version: 62.92.63.00.2D
IRQ: 16
Bus: PCI Express x16 Gen2