I seem to remember another person who was having troubles with really high resolution settings during the beta, but i dont know if they fixed their problem. I tried setting the resolution to the highest just after it updated and all settings went to default. I can try putting all settings down to lowest before i try the res change, but it might be the game not supporting them.
Though as i just thought of it, i have to disable my NVidia high perf. card and go to my integrated chip in order to play rebellion, as the NVidia chip makes it minidump on start, so it could be that the integrated as preferred doesnt support the high res.