I did, actually, and it doesn't fix themes. Themes are completely broken, and the default theme looks horrendous. (Courier font on everything, icons that must be two generations old, etc)
A number of extensions still do not work. Download Statusbar and Download Manager for starters, as well as Deepest Sender.
EDIT: Before I removed the new Swiftfox (and commented your repo out of sources.list) I checked... I don't think FireFTP worked properly, and I know Stop-or-Reload did not work either.
Finally, upon moving back, it has apparently lost some or all of my saved passwords and cookies, as I find myself logged out of Slashdot and Digg this morning, and upon typing my username, does not seem to have saved my passwords.
- Trip