This is a copy of my post in the tech forum that might help you , from one computer challenged bean to another. The name/date of the post is below if you want to read all the other explanations, which I'm sure are better than mine:
Re: Help with signatures/links/images/avatars here!
by Nancy and Cody » Wed Jan 06, 2010 7:42 pm
Ok, so last night I spent forever trying to figure the avatar out, but today I got it. Heres what happened and heres what I did in order
FYI I have a MAC book which is brand new to me so... plus I'm "not of the Twitter generation"
went to my pictures (iphoto) and found one I liked that the subject was kind of square
photoshopped and brightened it a bit
then
I found the above chats and went to shrinkpictures.com
clicked make avatar
then in this exact order 1 2 3
1 click choose picture- brings up my photos and I find the one I brightened- click it
2 type" 90" in where it asks for size
3 click resize and wait
then choose the 1 of 3 you like best
click download below that one
save it to your desktop
open user control panel in the FDMB
select profile tab
select edit avatar
shrink the open window enough to expose the avatar on your desktop
drag it onto the box that says upload from your machine, wait till you see a plus sign appear(+), and drop that baby
click submit and hold your breath
Last night when I hit resize the picture came up black everytime
today I choose a different picture and ta da!
Hope this helps