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And I'm not able to rename it from .jpg to .gif. I tried going under properties or just highlighting it and renaming it but the file type isn't in the name. It's just "33p6b9h".
It needs to be 160 or under in width. To size it you need a program that's used to make them. If you use a normal picture method, it stops the animation or else I'd do it for you.
Mine came this size so in order for me to put that as your av, you'd need to resize it. I don't have the tools to do that. I could try looking for one myself for you though.
It won't let me do it either, and it saves as a JPEG for some reason, which is why it won't upload properly. I'd try asking Brandon, he's better at the avatar stuff than I am.