I have a linksys wrt54g connected directly (wired) to a desktop and wireless to 2 laptops. I actually have no problem with the wireless internet connection dropping or anything like that. My problem is the desktop gets crazy packet loss (usually around 50%) whenever the router is connected. If I take out the router and connect the desktop directly to my cable modem, the problem goes away. I RMA'd the router with linksys and just received the new unit today, with the exact same problem. Before the linksys, I had a dlink router that also had the same problem. Could it be something wrong with my cable modem even tho it works perfectly fine when there's no router connected? If so, how can I get my ISP (Comcast) to replace my modem?