I used to have the drag & drop Widgets on Main Sidebar working but for some reason it no longer works. That is, whatever I place there (on the back-end) is no longer visible on the front-end.
In my attempts to troubleshoot this, I uninstalled completely the only 2 plugins I had:
But that didn't help.
I also switched back to the
twentyeleven theme (from a child theme containing
style.css only) but that didn't help either.
I also compared the content of the entire directory tree with pristine copy of the WordPress 3.3.1 ZIP package and found no differences. Does this point to some problem in some settings stored in the database?
Lastly, I tried the 3 different
Default Layout settings in
Appearance > Theme Options, just in case. That didn't help either.
What could possibly make the sidebar disappear?