Originally Posted by
Dee74 The maximum size of a custom image avatar is 135 by 135 pixels now or 24.4 KB (whichever is smaller). .
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From the edit avatar page.....
Note: The maximum size of your custom image is 150 by 150 pixels or 9.8 KB (whichever is smaller).
I believe Dee's instructions are for loading a picture in a post, or the actual parameters on the edit page instructions haven't been updated.