I'm told we were down for about 12 minutes while we did some kernel stuff....which may or may not have worked, so we may be down once again later tonight, hopefully for an even briefer period. For now, we're running - well, perhaps closer to "limping." If anything starts looking strange, or even stops working (yet you could still post here), let us know!
I'll see if I can figure out how to fix this later. What I probably need to do is send the post variables back with an edit button on the preview page, rather than have you hit back. I think that would fix it.