It’s always simpler than it seems isn’t it? I found the visualizations which it said it was compiling were actually being successfully compiled. It appears that they’ve added settings for the visualizations so that you can select which ones you want to appear as options. This is like the fifth time that added settings have burned me when I’ve upgraded MythTV, I’ve got to start remembering to check the settings before assuming it’s a compiling problem. Anyway, I updated the MythTV Wiki in case someone else runs into the same problem.