I have a Mac Mini (OS X 10.4.11); internet & email worked fine when I had it hardwired to cable. I've since moved it to the other side of the house and it has problems connecting to the wireless network (linksys router). The wireless network is strong, and my laptop (PC) never has any problem connecting. The Mac, however, sometimes connects no problem and works well for a while, and then just dumps the connection and won't reconnect. I can't figure out what makes that happen. I finally get frustrated and walk away, and an hour later when I walk back it's working again. The signal strength indicator will vary from full signal strength to zero (even though my laptop never has any problem at all connecting). I live at the end of a cul-de-sac with basically no neighbors, so I don't see there being any sort of interference. I stopped by an Apple store today and the best the salesman could do was blame Comcast, my internet service provider. Thoughts??