I just upgraded from 2.2.0 to 2.3.1 and now my control panel is unstyled. I’ve looked at a bunch of posts with similar problems and nothing (including re-uploading the CP theme folder) helps. I have not tried moving the CP themes folder as suggested (the open_basedir business) because it seems if that would fix it, it wouldn’t have worked before; and I’m hosted at EngineHosting, who, it seems likely, would not have servers set up so they screw up EE. I’ve checked the themes location in the unstyled CP and it appears correct. (That’s kind of like a videogame; when you try to click stuff, it jumps away or disappears.) Looking in Firebug, it appears the page is finding all the proper CSS and JS files (they are expanded in Firebug), but it’s ignoring them. Suggestions?