I've tried to alter my fullscreen res to match my monitor (1280x1024). I came across two issues.
1) For some odd reason, pressing the left arrow key give one set of resolutions, pressing the right gives another. Sometimes I can't find my resolution at all, it seems to need some kind of odd combination of left and right. Am I missing something?
2) When I set the res to 1280x1024, things seem fine but the textures are messed up, as expected. So if I exit and restart, oolite often won't start up in the higher resolution. Sometimes it just takes a while but other times it hangs. I had to go into the .GNUstepDefaults file and manually set it back to 1024x768 to get oolite to start again.