I just signed up to report a graphical error that matches PlatinumSkullz's error report, except using Magic Launcher I was able to search through the logs and found this:
Its the only graphical error of its kind present in the entire log, and it messes with everything from the Ironchest mod to a world-gen volcano from RedPower2, and my character model and causes missing limbs and other graphical glitching with mobs and other blocks that won't render correctly. Any help would be awesome.