(FYI – I did contact WP directly about this as well.)
I’m having this problem too…
I can reinstall 4.1.1 (that’s fine) but before I do that, can somebody please let me know if by uninstalling 4.2 I will lose all my settings when I reinstall 4.1.1? For example, we use the “Edit CSS” feature to override CSS. It would be a big problem to lose all of that work.
