Web pages served to all Mac’s extremely slow compared to PC’s

10.5 Xserve - OpenDirectory After upgrade to Leopard on Xserve all of the HTML pages served take 5 to 10 times longer to download from the Xserve when using a Mac client machine than on a PC. Tests were done accessing the same files, same time of day. The version of OS or HD setup on either the Mac or the PC makes no difference. Example: webpage takes 17 seconds on Mac, 1 sec on PC. I have even seen pages come down to the Mac in 1 min while taking only a few seconds on a PC. These are not complex pages. When trying to access Flash content it only gets worse. General file transfer on LAN is normal. Never seen or heard of anything like this. I would appreciate any thoughts, suggestions.