I figured out why my old thumbs seemed fuzzy. At some point I must have used ctrl- on Rendo. If I set it back to normal, the old thumbs seem crisp. The weird thing is that other places where I had used the same image look sharp no matter what.

 I tried creating some albums and... you guys weren't kidding about the amount of work. I noticed that my album has an ID of 171 and it appears unconnected to my username. Which means only 170 albums have been created since the change, is that it?