I had similar problems with Tomato on an E4200 -- it would reboot itself every few hours (noticeable when the wifi would disappear for a minute or two!). My gue

I had similar problems with Tomato on an E4200 -- it would reboot itself every few hours (noticeable when the wifi would disappear for a minute or two!). My guess is there was some kind of lockup, but a watchdog had enabled to reboot it when the lockup occurred. This can be caused by overheating, in which case you can try turning down the Tx power setting on one or both of the radios.