hi,
i tried doing that but it still says it's too big. i tried making it smaller (30x30) and it still says its too big so i'm not sure what i'm doing wrong.
Is it the filesize that is too large? You'll probably have to compress the image. For best results, make sure the image is a .jpg file, which has good compressing rates and common for webpages.
Go to User CP --> Edit Avatar. Scroll down. Right below where you can click to upload, they list the specifications. It's 100X100 or 19.5 kb, whichever is smaller.