I’m hoping that someone watching this thread may have an answer; this happened to me as well, two sites, two different servers, WP 2.1.2 and 2.1.3 respectively, no upgrading — and I’m not sure what could have been done to the sites to have caused this. If anyone can provide assistance, I’m sure we’d all be grateful. It’s a bit like aliens have landed, this week… 0.o