I used EApache 3 to upgrade php and Apache and while everything seemed OK in the beginning, I soon discovered that I had Ajax errors 406 all over the place (different drupal 7 sites). Ajax was working in a few places. I was not able to determine why it worked in some places but it was after disabling stuff. Initial upgrade was Apache 2.2 -> 2.4 php 5.3 > 5.5 Then downgraded to Apache 2.2 php 5.5 but had same problem. When I downgraded back to previous configuration Apache 2.2 php 5.3 and everything worked again. My main suspicion is that there was some problem with my php.ini (which I am attaching here). Is there anyway to get EasyApache to generate a fresh php.ini? Note: Same drupal sites work fine in a local windows acquia dev desktop environment in different php versions 5.3, 5.5, 5.6.