Is there a way to prevent animated avatars?

[AndyB]

I would like to prevent animated avatars from being able to be uploaded and used on my forum. Is there a setting that I have missed that prevents them?

 

[Jake Bunce]

There is no explicit setting. But if you use the GD image library then animations will not be supported on resizing which affects all but large avatars:

Admin CP -> Home -> Options -> Attachments

Changing the image library is not retroactive to existing avatars though.