This is a simple issue, but one that wasn't immediately evident to me. When using Firefox in ratpoison, I noticed that there was a 1px border surrounding the window. This is annoying, especially when trying to scroll with the mouse -- it's always easiest to fling the mouse to the far edge of the screen, so I'm not scrolling frames or text boxes (or flash). But the 1px border is essentially dead space, so I then have to move back a little, wasting time. (I suppose this relates to Fitts's law).
It's not hard to fix, but the commands changed at one point, and I was still using the old commands. This is what I had in my .ratpoisonrc (which wasn't working):
defborder 0 defpadding 0 0 0 0 defbarpadding 0 0
That should be replaced by this:
set border 0 set padding 0 0 0 0 set barpadding 0 0