I just saw the same thing.  I had a small amount of bitcoin on "auto exchange wallet" move to "on exchange" after being stuck there for 4 months (it was small amount so it was extremely low priority for me).

I had talked to my buddy a few days ago, who knows someone that last talked to the pool operator four months ago, to see if he could find something out... maybe word got out.  I haven't talked to him about it since though.  My buddy is a software developer, and i'm a hardware guy.