WordPress 3.5 and mod_pagespeed do NOT play well together

WordPress 3.5 may look cool, but it has found a dozen new and clever ways in which to break itself. Last week, I figured out how to fix the “Add Media” button. This week, I discovered that I could no longer select any drop-downs in the admin screens, add tags, or click most buttons. I dug around and found the “Troubleshooting WordPress 3.5 Master List” which lead me to discover...