Trac registration requires that username is an email address
the tor bug tracker registration page shows a field called username. however, there is an error message when entering a username that is not an email: "Account registration failed (EmailCheck: You must specify a valid email address., RegExpCheck: The email address specified appears to be invalid. Please specify a valid email address.)".
suggestion: ask for an email instead of a user name.
Trac:
Username: downloadfiles@grr.la
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information