I was running D6.18 on a linux machine. I have shell access.
I followed the UPGRADE.txt file and all seemed well until I tried to go back and put it back online, that is not in maintenance. Going to /mysite/user did offer me the chance to login but /mysite/user/login told me
Notice: Undefined property: stdClass::$content in include() (line 10 of /mysite/themes/garland/block.tpl.php).
five times and did not ask for my password. Looking through the files I see that themes/garland/block.tpl.php was not in the 7.0 tar when it was untarred and so it was not updated.
I'm trying to make the "contact user" form show up in both a view as well on individual page views. I've flipped through a couple books and searched online on how to fix this in Drupal 7 with no luck.