Thread:Project:Support desk/InstantCommons quit working (and bogged down my wiki)

I've been running MW 1.18 since about June, and up until this weekend, it was doing great. I don't know what happened, but over the weekend, the InstantCommons feature just quit working. All the WM-hosted image files became red links and the site really bogged down. For example, I waited seven minutes for a page edit to display the new page before I gave up and canceled the page load. The edit did show up in RC, (which takes half a minute or so to load). I turned InstantCommons off as an experiment, and the wiki started behaving responsively again. My first thought was that this was related to the move to Ashburn, but perhaps that is just a coincidence. If that were the case, I would have expected to find reports of similar behavior, but my site seems to be the only one affected. Any help is greatly appreciated.