see the picture, for those who cant see it, it shows the task manager on the "performance" tab that shows an increasing amount of memory usage, at a certain point alice crashes whiteout warning

im using alice 2.2, using whit the "force software rendering" box checked (the world does not load otherwise.... though it does on school computers running XP)
the .exe runs whit visual themes disabled, because i felt like checking that box, i dont think it matters.

the world itself is about 20 MB large... made on various school computers, all running alice 2.2

any thoughts on this issue? leaking 4MB every second ain't nice..

my specs:
win 7 ultimate 64 bit
4 gb of ram
2.4 ghz c2d (mobile variant)
ati 4570 graphics card