Hey heres something for yah. every time i try to use one of my own avatars it won't let me. it always says it is too big, but when i download one of zelaron's pre-aproved avs and tried to use that it also said it was too big.
Either, it's dimensions are too big, or the file size is.
115x115 pixels, and 20.000 bytes (around 19.5 KB) is the maximum size for an avatar. The standard avatars are a little larger than that, but since they are nicely done, we decided that we should keep them.
However, I might increase those image restrictions later on.
"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram