In the first few days of November, I noticed that the ShareThis links on the site stopped working. A quick look at the Error Console in Firefox revealed the error "shareel is null". Oops. Something broke, and I suspect it was because I allowed an update to happen that contained a bug. After a frenzied search, I found that the Drupal community had discovered that the solution was to step back to a previous version of ShareThis.

• Navigate -> Administer -> Site configuration -> Share This Settings.
• If there is a an enable/disable selector, select Share This Disabled, and click -> Save Configuration.
• Navigate -> Administer -> Site building -> Modules, deselect ShareThis (probably in group Other), and click -> Save Configuration.
• In direct session, type the following commands:
  cd ~/public_html/sites/all/modules
  rm -r sharethis
  wget ftp.drupal.org/files/projects/sharethis-6.x-1.3-3.tar.gz
  tar -xf sharethis-6.x-1.3-3.tar.gz
  mv sharethis-6.x-1.3-3.tar.gz ./uploads
• Navigate -> Administer -> Site building -> Modules -> Custom Modules by Himerus, enable ShareThis, and click -> Save Configuration.
• Navigate -> Administer -> Site configuration -> Share This Settings, select Share This Enabled, and click -> Save Configuration.

Share this should now be working again. You can take addtional steps to customize the ShareThis pop-up. To do that, follow the link to the ShareThis site that is included below the Javascript code window on the Share This Settings page.