Cod 5 was working flawlessly at 1680x1050; I did not remember to change to 1920x1200. Most of the other games that I have seemed to work fine (TF2,COD,COD2, etc). Thus, it may just be an issue with Fallout 3 1.4 and Vista-64 Ultimate. I'll test again tonight if I have time.
Frankly, if it is...