Blizzard has released a version 1.08 patch for Diablo II. The patch is available for both the Windows and Mac OS versions of the game, and consists of a number of bug fixes, as well as gameplay changes and tweaks including skill and class modifications. A full list (along with a FAQ for the patch) is available on Blizzard's download page. The download server appears to have some connectivity issues, but you should also be able to use the auto-updater.