When I first open my solution (containing around 500 files / classes in 8 projects), devenv takes roughly 35 megs of RAM & virtual memory.
But at some point it rockets up to 115 MB of VM, without any apparent reason.

I know that RAM is cheap these days, but isn't 115 MB a bit extreme ? it's only a UI !
Compared to VC6 which takes at most 30 MB of VM (with visual assist) it's quite a leap.