Hello,
Dropbox was not always syncing via camera upload so I decided to reinstall (on Windows 7 PC and Android phone). The phone icon looks different now (lighter blue) so I guess the Android app is new -- version 3.0.4.10 on Samsung Galaxy S5. I can't access the version on PC, none of the online methods work for me.
I can log on to web as well as run the desktop app with a newly reset password. I have disconnected my phone from the account. When I try to sign in I get a banner message "please enter a valid email address". This banner is above the email entry field, unlike the red message UNDER the email entry field when the email is not even an email format.