The reply I got from Nokia Care regarding a little issue I had while trying to reflash my device..

"Dear Mr. Davies, Thank you for contacting Nokia Care. We understand that you are trying to reflash your Nokia N900 software. Please be advised that we do not recommend our consumers to reflash their devices. Therefore, may we suggest that you take your mobile to the nearest Nokia Care Point (NCP) for an assistance and also for out technicians to assess your device. However, charges may apply as reflashing will void the warranty of your device. "

Maybe I missed it, but I dont remember reading anywhere else that flashing the device would void the warranty.....