With my BEFSR41v3 router (and also with my new WRK54G) I have the experience that it would drop connection or hang once a day. It was only possible to get it up again by a power up cycle. In those days I had the uPnP option enabled. I also experienced that when both where in my LAN (one as router, other as switch) the drops came more offten. Since a week I disabled the uPnP option en use only port forwarding and everything is running flawless. Is there an explenation for this behaviour?