Got the email from Microsoft a few hours ago. Should be available in most marketplaces by the end of today.
This time the “pass” is conditional though, and I have to fix my wicked ways to avoid getting a fail next time :-) Basically I forgot about the requirement (18.104.22.168) that the phone back button has to close the active view and take you one step back. What happens instead, if you get a Dropbox error dialog and press back it will not just close the dialog, but take you all the way back to the main menu.
My bad. Good for Microsoft that they spotted it and still let the app through. Will fix.