I'll give it a go but not sure if it'll work.
After doing some research it appears that it might be something to do with p2p software and the Linksys router hanging on to the connections for up to 5 days?!
It's so annoying, you could be browsing the internet, then all of a sudden it'll just freeze, fail to connect to the website (as the browser times out) then you hit refresh a couple of times and it's back!
I don't think I actually lose communication with the router, however nothing transmits through it to anything attached to it. E.g. my PS3 and therefore it quits my game.