Minor issue but I was debugging something else with Fiddler and it kept telling me this about responses from HN: Fiddler has detected a protocol violation in session #122. The Server did not return properly formatted HTTP Headers. HTTP headers should be terminated with CRLFCRLF. These were terminated with LFLF. Presumably this is an issue in the Arc code outputting the headers. Also, is this where I should report this or is there a support email or something I can address?