We're having a Netgear WGR614v2 router, and as soon as a device generates some WiFi Traffic, the router completely dies.
By opening http://9gag.com/ I can reproduce the problem.
$ ping 192.168.0.1
From 192.168.0.2 icmp_seq=215 Destination Host Unreachable
Is it possible that the router can't handle the number of simultanious connections that modern browsers use?
It's quite old.
There's probably nothing you can do?