Xymantec et al,
I’m running 3.4.2 and likewise cannot drag and drop menu items or widgets.
1) I disabled all plugins, and still no go.
2) I reset permissions for the wp-includes folder and all sub-folders, and all files within the wp-includes folder as recommended above. Still no go.
3) I changed my theme to one of the wordpress default themes, and still cannot drag/drop menu items or widgets.
Any further recommendations other than rolling back to a previous version of wordpress? Pulling my hair out over here…
Thank you,