As of 11:41 AM EST, 11/25/2009, the Safari download page looks VERY odd, at least when viewed from a Windows browser. It shows "Safari 4.0.4 for Leopard" as all 4 choices. Clicking Download Safari for Mac shows Snow Leopard as the only choice.
Looks like just an issue with the icons. When clicking download on a Windows machine (even though the selection is for Mac OS X Leopard), the .exe file is downloaded properly.