I've just downgraded my doctorlizardo site (and my teaching site) to a domain name only, as I'm currently not really using it for anything but hosting images and things.
Now that I can do most of that on Flick'r or even on Blogger itself, there's not much reason to pay $10 a month to Yahoo. That's $120 a year! (Or "ten bottles of wine" as my husband would point out, should I give him the chance.)
So there are probably a bunch of images that disappeared from my blog, especially the archives. And wherever I commented on your various and sundry sites, that avatar probably disappeared, too. (I have to remember to recheck that whole gravatar thing, too.)
The reason there is now a squirrel gif on my banner is that the rat wheel gif was one of the disappearing images. I thought I had a copy of that one in my picture files, but I can't find it. Probably on one of my backups from three years ago or something that I'll find in another three years, accidentally. Oh well.