Hello, We have just installed the trial version of Litespeed Web Server Enterprise v4.0.18 on our forums, but despite the obvious increase in performance, it seems to have broken the vBulletin Tapatalk plugin used by our iPhone / HTC users. Basically, the installation verifier from the Tapatalk site gives the following error: "Not Installed: Cannot detect /mobiquo/mobiquo.php. Check this file existence and try again." And sure enough, the direct link to said php file gives a 404 Page, even though it is there where it should be. The weird part is that a .js file (tapatalkdetect.js) located in the same folder can be accessed without issues There were no changes made to the htaccess file, firewall or folder structure when we switched from Apache to Litespeed, so the only conclusion we've drawn is that there's something in the Litespeed config which is "blocking" the access. Any suggestions on how we could solve this particular issue would be very appreciated.