I'm working with a wordpress site that someone else developed so I don't really know how things should look like, but it has some problems with Fancybox. There are some galleries that were made using this plugin, but there's no way to edit/modify any images on them; the galleries simply don't show on the edit page, nothing appears there. The plugin was disabled and enabling it makes not difference, with the exception that the zoom function stops working when it's enabled.
It's running the last version of wordpress and fancybox. Theme is "King Size".