I did find something wrong with the search. When I enter search criteria for 1 year it gives the error:
"The specified date range is too wide. The maximum date range you can search with is 1 month."
I assume that's a site-wide setting.

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The local option does limit to 80x80 size. I didn't see anything about kb limit.

80x80 is a great limit. Assuming they would have to use one of the more efficient file formats like jpg or gif, then nevermind I mentioned a KB limit. It'll probably average about 3-4KB. I remember now - I believe it's not possible to limit an avatar size when they are hosted remotely. I think we discussed this possibility in the past in this forum.

We should make a rough estimate of typical number of unique avatars per forum page times number of forum page views per month times 4KB. Do we want to allow or can we afford that added bandwidth? If they are hosted here, there will most likely be more people that use avatars. As a comparison, Colorado4x4.org hosts everyone's avatars (up to 100x100 pixels) and maybe 75% of posts have an avatar next to them.