Community Theme & Gravatars Glitch! Well I think Anyways!!

I just installed the community theme tonight and while I like it seems to be having issues with properly displaying Gravatars. Some of the Gravatars os being displayed all pixelated. Like the image has been blown up. When I right click and view image I am taken to a tiny version of the image less than half the size of the version being displayed on the blog.

Also its only effecting cretin images depending on where they are place. For example my Grav image in the header is pixelated while the image of me on the side bar is fine.

I like the theme but I can't use it if the problem persists.

Any thoughts on how to fix this?

here is a link if it helps.