animated gifs have never worked. it's annoying, but there's some third-party software to fix it. I don't remember the name -- it wasn't free, and wasn't worth paying for, so I didn't keep it. The icons in iChat are so small, it's not worth it anyway.
As for links, I'm not sure what you mean. When someone includes a url in a message, it becomes a link when you receive it, and clicking it will open the page in Safari. I've never heard of that not working. Where are there links in profiles?