Netgear draft-n router has to be rebooted everyday to work

Hey everybody,

I bought the Netgear WNR854T some time ago and it seems like it can't
stay stable for more than a day. WAN and WLAN work perfectly, and then
suddenly, once a day, every kind of connection is lost. That means: no
connection to my home network, no connection to the internet, and no
connection to the router. It happens for all the computers/notebooks on
my network (wired or wireless). However, all the leds of my router blink
like everything's ok.

I installed the latest version of the firmware: Version 1.4.09, which
didn't solve the problem.
I got a dynamic IP, and my router is connected to a cable modem, which
basically requires no special configuration on the router, according to
my ISP.

The only workaround I found is to cold reboot the router, everyday, to
get the connection working again. This is not tolerable.

Any kind of help would be greatly appreciated.