The forum went down for a few mins some hrs ago. And it's been a little slow most of today. I can see your avatar fine, it looks good! (only joking!) Yes the forum software has just very recently been updated & custom avatars & image attachments aren't showing. It's also affected all of the Stickys in the forum. We'll try to get it fixed asap ... but that might be some days ...

BTW I reloaded my avatar ... that's why mine works!