As of the 3.5 update to WordPress, we started receiving reports from a minority of customers that some functions simply stopped working in the WordPress dashboard. Specifically, the quick edit dashboard panel was unresponsive, under Add New Post the toolbar above the text area wouldn’t populate, and, the drag and drop functionality in the Widgets dashboard simply stopped working.
Not being the developer of WordPress, we were short on answers, which is never the preferred position to be in. We like having answers and being able to solve problems.
Thankfully, one of our great customers was able to find a fix and was kind enough to share it with us (so we could pass it along to you.)
By installing the Google Libraries plugin, these functions were immediately restored.
If you find that you’re having the similar issues, we recommend trying this fix.