Ran into an interesting and frustrating performance problem with a site at work today. Any OSX or derivative system (iPhone, iPod, or laptop/workstation) was seeing extremely poor performance when visiting a site using Tomcat 6 and Apache's mod_proxy (specifically mod_proxy_ajp) with a couple ProxyPass and ProxyPassReverse directives.

Searching around a little I finally found this helpful post that seemed to describe the problem users were experiencing:
http://betabug.ch/blogs/ch-athens/933