Honestly, the image resolution requirements don't bother me near as much as image file size requirements. Even worse when they're paired illogically with resolution requirements. Like, you can have an image up to 100x100 on Forum X, but the image's file size can't exceed 10kB. As an example, the only way to get my Garrett avatar (which is in PNG format, my default format) down to below 10kB is to shrink it to 65x65 pixels. I just...I don't even know, do they expect our avatars to be stick figures?