I updated to WP 3.6 and I'm getting this strange grayed out popup with a never ending loading icon. I can close it just fine and the page returns to normal, but if I navigate to another page, it happens again. Here's the website:
http://websushidesign.com/blog
I updated a couple of other WP sites, but it's only happening with this one. I tried deactivating each plugin one at a time, but the problem persists, so I think it may have something to do with the theme.
Any ideas on how to fix this? Any insight would be much appreciated. Many thanks.