Gamma gets crazy bright after playing

[adam_0]

So I play Killing Floor on the following machine:

iMac 11,1 2.8 GHz quad-core i7
Radeon HD 4850 (512 MB)
12 GB RAM, 1 TB HDD
Mac OS X 10.7.3

I can consistently reproduce an overly-bright gamma setting on my machine by following these steps:

1. Play Killing Floor
2. Quit
3. Put computer to sleep
4. Wake computer from sleep

When I wake from sleep, all normal text is a light grey, and any "greyed out" text is nearly invisible. The only solution that I have found is to restart my machine, which is starting to annoy me.

Anybody know how to keep this from happening, or a quicker way to fix it?

Thanks!