Hi there. I've been looking into this issue for you, and although I manually purged your blavatar from our cache, it seemed to still be out of date in some other caches, resulting in varied experiences (I could see the new blavatar when I load your site but some still saw the old).
Sometimes, uploading the blavatar can clear this issue up. I've re-uploaded the blavatar for you, and preliminary testing suggests that this may have fixed the issue. That said, it can sometimes take a little time for such changes to propagate, and the browser can cache these little icons pretty aggressively.
Please take another look at the site with browser cache cleared. If it's still not resolved within a few hours, please do let us know. (I'd also be grateful if you'd let us know if it is fixed for you now.) Thanks!