The FancyZoom module and scripts have been completely rewritten to play more nicely with Drupal. The FancyZoom Javascripts (download from http://www.thinkyhead.com/design/fancyzoom) are now encapsulated in Drupal.behaviors and no longer step on global scope. Settings for the script are now properly supplied by the module in Drupal.settings. I also fixed a bug which was causing files with names like "myFile.jpg.zip" to get zoom applied to them. The jQuery version of the script will now attempt to reapply zoom after an AJAX update.