I have been struggling with this problem for a few days now. I'm running ArrowChat for integration with IP.Board. I have two different dedicated servers available, one on which I did manage to get the ArrowChat working right out of the box and one on which it simply gives me an 330 (ERR_CONTENT_DECODING_FAILED) error.
Now the funny thing is, on both servers I run the (same) latest version of WampServer. The dedicated server on which the system does work does not have deflate, headers or php_zip enabled, which leads me to believe these are not required for this to work.
I did a clean re-installation of the WampServer x86 on -both- servers with no change: the server on which it worked it still worked, and the other one simply fails to behave accordingly. There are no errors in the apache_errors.log that help me, either.
I'm running the trial version of ArrowChat which is loaded through an ionCube-loader.
When running this software on my localhost with the same configuration, it works flawlessly as well..! It's important for my forum software to run on the dedicated server that is currently not working, so a solution to this problem (or hints) would be absolutely fantastic.