During an upgrade of a module 'Mollom' in Drupal 7.12, the website crashed. We could reinstall everything, but it may be easier to fix the problem. The error:
"Fatal error: Class 'MollomDrupal' not found in /var/www/html/sites/all/modules/mollom/[login to view URL] on line 2150"
While we're at it, we want to upgrade it to the latest version, 7.22
Drupal Expert here. I make sure the patched modules are not affection and test each functionality well. We are maintaining more than 100 drupal site and keeping them upt0 date.