I have an early 2008-model MacBook (2.4 GHz). The Wi-Fi router I have at home is a Linksys WRT54GX2 that I have had for a few years.

My MacBook has recently started disconnecting from the router every few minutes, which is rather annoying. I can reconnect again without having to restart the router or anything, as it seems that the MacBook is just dropping the connection.

I have tried changing the channel on the router, and upgrading the laptop from Leopard to Snow Leopard made no difference either. I'm only about six feet from the Linksys device, so distance isn't an issue.

This only happens with the Linksys router, while I can use the local library's open network without any issues. The problem also seemingly becomes more pronounced after midnight.

What could the problem be?

Edit: Here are the logs that Spiff requested: http://pastie.org/951761