Due to compatibility issues between my old Dell router and my Comcast cable modem, I switched to a D-Link router. It's worked fine with one small exception: Every five minutes or so my laptop will lose the wireless signal but then recover it within a couple of seconds. (I get the little pop up in the system tray saying "unavailable" and then just as quickly, it will say "signal strength excellent.") For normal browsing it's not a huge deal, but it's frustrating to get interrupted when downloading things. Is this a common phenomenon with wireless cards and routers (though, like I said, my Dell never did it) or is there a problem with my router?