I’ve had the exact same issues since I upgraded. I checked with my host and discovered that my CPU usage was almost maxing out, too. I tried re-installing and that didn’t work. I deactivated all of my plugins and even optimized most of the images on my site, too. Still nothing. Everything was fine until I upgraded. Even the site itself is extremely slow.
That was all you had to say. I had some un-needed padding in the style sheet for my site that was conflicting with your plug-in. Thanks!