I have been using a DIR-655 (firmware 1.31) connected to several PC's for 2 yrs now with very few problems other than regular dropped wireless connectivity that is easily fixed by the repair function. Recently I purchased a Mac Pro which was easy to setup (auto) with the Airport wifi.
Just one puzzling problem which is giving me a hard time. I cannot connect to one particular site (rapidshare.com) when using the Mac (doesn't matter what browser, the same result every time "looking for. . . . cannot find the server at www.rapidshare.com). Yet the site is accessible by all the PC's in the house.
I have been told by Apple techs (not surprised) that it is not software or hardware settings on the Mac Pro. Could it be a setting on the router specific to the architecture of Macs that is blocking this one particular site?

Have whatever opinion of the site you want, that is okay by me. I do buy lots of software, but only after I really know it suits my needs.
If this is not a router issue then I apologize.