Here at SEO Positive we had an issue with one of our blogs, an unresponsive script preventing the editor from working. After some digging around in the shroud that is WordPress’ code I worked it out to be an issue with the wp_postmeta table.
The error occurs in this file, ‘/wp-includes/js/jquery/jquery.js?ver=1.3.2:19′
We updated our site a number of weeks back and re-imported all of our blogs, when you import a blog it would appear there is a glitch that inserts into the wp_postmeta table rows with a postid of 0.
This is what causes the unresponsive script, below is the code that we used to fix it, all you have to do is log into your database, back up the wp-postmeta table (just in case) and enter this into SQL input
delete from wp_postmeta where postid = '0';
After you run that on your table you should find that your WordPress blog works just as well as a new blog.