Still broken, it refuses to delete the cache of the page I'm on, or any cache at all when I'm in admin. Other delete options work fine, including the settings page where I can click and view the current list of caches and delete them individually. A link like this on the list of caches works fine:
This is the copied link the delete button of the same cache file that remains broken:
I don't know if it's related, but when I see the list of cache files, it has a trailing slash (e.g. blahblahblah.com/blah/. My permalinks don't use trailing slashes though. (e.g. blahblahblah.com/blah )
I can't see this being a permissions issue, as the old delete options work fine, it's just the delte button in the admin bar that remains broken.