Open an NOF 9 website with NOF 10, make NO CHANGES AT ALL, do a local
publish, and stuff that looked right in Firefox 2.0 doesn't look right any
more. Stuff is moved down and to the right by a few pixels. (This is with
Dynamic Page Layout.) Go back to NOF 9, republish the old website, open in
Firefox 2.0, and it's right again.

On the other hand both look fine in IE 7, but an awful lot of my readers
are Firefox types.

I knew I should have waited a while until the bugs were shaken out.
However, I know you'll get it fixed in time.