We're using a custom theme. When we updated to 3.1 the add image link stopped working. It would not pop up a lightbox. Also, add category does nothing.
We switched to Twenty Ten and it works. We need our custom theme, though. The strange thing is that it's only a problem with the backend. The site works fine. The problem is only with the Add New Post and Add New Page pages. I didn't think these would be affected by any theme files. Can someone help point me in the right direction? How should I debug this? What files might hold the problem?
The blog I need help with is clayburn.wordpress.com.