I was running with Drupal 6.22 and tried doing an upgrade to drupal 7.10. The upgrade reported everything was successful.
My problem is that I was previously using a theme called 'contrast'. I thought that I had disabled it, but it now has references to that theme.
How can I get around these errors?
I tried moving garland into the all/themes folder and renaming it to contrast, but that only created another set of errors.
Notice: Undefined variable: site_name_and_slogan in include() (line 14 of /mysite/sites/all/themes/contrast/page.tpl.php).
Notice: Undefined variable: site_name_and_slogan in include() (line 14 of /mysite/sites/all/themes/contrast/page.tpl.php).