I've searched a bit through the forums but haven't found quite the problem I'm having.
I recently upgraded my wordpress to 2.2, I also recently added the widgets plugin which always seems to error when I try to save it (but this time, it successfully saves the changes and seems to work fine despite that).
Whenever I try to create a new page/post or edit an existing page/post I receive my 404 This page does not exist error.
It probably has something to do with my recent upgrades but I simply can't figure it out. I thought 2.2 autosaves but I'm losing some or all of my entires if I don't manually save it and even if I manually save it, I run the risk of erasing the whole thing because it'll go the 404 error. Note, it doesn't happen every time. If I hit the save button a second or third time, it'll work.