When clicking the New Override Button I receive the following error:
Fatal error: Allowed memory size of 262144000 bytes exhausted (tried to allocate 10817744 bytes) in .../wp-content/plugins/gantry/core/gantry.class.php on line 1090
This may be because we have 8,000 tags and about 5,000 Posts. This clearly was not designed to work on sites of any size.
All those scrolling menus for Posts, Tags, etc. need to be replaced with a Text Box. I'm not sure who's idea it was to query every piece of content ever created on one page, but they clearly have never operated a real world website.