As I mentioned in another thread, I'm using this on a Multisite. The batch option to do all files on the site works just fine. However if I select a few images from the media library and use the Bulk Actions menu to try and Smush just those images, it doesn't work. The page just reloads, and nothing happens, no message saying it was completed, no indication in the Smush.it column that those images have been Smushed.
Any ideas what's going on here?