OBS! Mobil detection was added to this release of Colorbox and it's on by default, i.e. Colorbox will not be active on small screens (mobile phones) by default. I personally don't think modals belong on small screens and therefor I made this choice.
If you really need/want to reactivate Colorbox on small screens go to "/admin/config/media/colorbox" under "Advanced settings" after updating to this version and turn of mobile detection.
* Followup fix to styles CSS since the Colorbox plugin removed the hover class in favor of CSS hover state some time back.
* Drush command now automatically renames the "colorbox-1.3.18" directory to "colorbox".
* Back-ported the Drush command improvements from Drupal 7 version.
If no major bugs show up this is quite likely the last release for Drupal 6.