the main window is always a few pixels down to the right, wich makes the right most border of the window fall off the screen wich means the scroll bars aren't usable either.
its a very annoying bug thats been going on for a long long time in FR, its time to crush it. be done with this problem.
if there is a module for skins, i bet its the source of the problem. if you remove it, its useless in a program like this and a waste of ressources, and i'm sure will fix this problem once and for all.