How about increasing the width at the edge of a window where it allows you to resize it to something other than a single pixel? That's one of my biggest usability gripes, at least for something that seems so obvious and easy to fix.
It's possible it's already been fixed (I use Lucid), in which case disregard. But I would upgrade for that alone.
I frequently have the single-pixel resize handle problem. What's even more frustrating is that there seem to be at least two pixels that cause the cursor to change, so more often than not my first click doesn't actually start the resize. Sometimes I get to three or four unsuccessful attempts to resize my window and can't help but feel like I'm on Candid Camera.
I feel your pain. While they fix it I found that doing 'ALT+SPACE' and then pressing 'R' helped me a bit. But yeah, three keys for something that should be intuitive..
I've always had to resort to right-clicking the title bar and hitting "Resize"; this shortcut to do the same thing is very helpful.
But I agree with everyone else in that it shouldn't be necessary to go through this just to resize windows, but I've always blamed myself for not learning awesome.
If you have a middle button, holding down alt while middle dragging gives a nice and easy resize that only requires you be within what seems to be 1/3 of the window's dimensions away from the border you want to resize.
It's possible it's already been fixed (I use Lucid), in which case disregard. But I would upgrade for that alone.