Memory Leak?
So, the game seems to shoot up in memory use if alt-tabbed multiple times. While initial memory use hovers around 500 MB, if alt-tabbing while playing, that number can surpass 800 MB. Is this a known issue? Most games may increase a bit in their memory footprint when repeatedly minimized, but certainly not by 60%.
System stats:
Intel Core 2 Duo E6420
ATI Radeon HD 4850
nVIDIA nFORCE 650i Ultra mobo
4 GB DDR2-6400 RAM
Windows Vista Ultimate 64-bit