412 Precondition Error

Earlier tonight I upgraded WordPress to 2.0.4 on my site, worked great. Then I attempted to setup the email blogging and am now getting a 412 Precondition Error every time I attempt to visit my site. The only thing I did was create a new email address in my account and then setup WordPress to use it. Didn’t change anything else from the working setup to the non-working setup. Anyone ever run into this problem?

My site is at http://smccloud.com in you want to read everything it says.