Okay... so i"m playing a nice happy game of tremulous. The last alien eats a fully charged blast from my luci. Then, the next map starts to load and BAM. I'm back at the main screen with a window that says "could not load map "somethingsomething." My mouse is also gone, and I have to use arrow keys and enter to highlight the buttons. I quit, restart, and if I try to go to the map again, the same thing happens. If I go to a different map, it works fine, and when i return about 20-30 minutes later, it works again. Whats my problem?