I'm not very computer savvy, so I'll try to ask this in a way that's understandable. There's a limit to how big you can make your pictures (i.e., 400kb on beginner board, 750kb on intermediate, etc.). What exactly is it that fills up the 'kb meter' (for lack of better word), and is there a way I can minimize my chances of going over the limits? Finally, is there any kind of penalty for repeatedly going over the limit (other than constantly bothering mods for more space?)