The database username/password and superuser username/password are still shown when selecting SQLite, though they're no longer checked. Either the user/pass/superuser fields should be moved into the database-specific sections (thus disappearing out of our way when unneeded or they should be separately hidden when we select a DB that doesn't support them.

FWIW the new-installer branch seems to fix some of this stuff. I recently managed to merge trunk back in (and get it at least functioning again). Perhaps it's time for someone to dust off the branch and finish it--I don't have the time though :(

Fixed in r57949