Page write broken in 2.1?

Ive been fighting with this for 2 days now, its time to call in the experts.

http://www.eoutdoorsman.com

In WP2.0, I used the redirectify plugin to provide links to my IPB Forum and Coppermine Photo Gallery from my homepage. As far as I can tell, this is causing me problems with WP2.1.

I uploaded 2.1 to a test directory with a blank database to test out my skin. Everything worked fine there.

I performed an upgrade on my existing WP install as outlined in the docs. Backup, kill plugins, delete old files, upload new, run upgrade. Everything looked fine. Then I clicked on a page link and all of them were broken.

I activated the redirectify plugin and it didn’t help. Deleting the pages and re-adding them didn’t help either.

I started over. Deleted all files, restored DB, uploaded fresh download of 2.1, ran upgrade, and I could still not write a page.

It happens with normal pages written (see what happens with the About Page linked there now) and I have completely given up on the external links for now. I did try with the classic and default skins just to be sure it wasn’t skin related.

Any ideas??