That is terrible..

We provide tools, and firmware files.. that any valid user can download.. but if you use them (even following instructions written BY a nokia employee)

http://discussions.europe.nokia.com/...&thread.id=168

then you will void your warranty.. Nokia need to put a big banner on the tablets-dev site.. This WILL or WILL NOT void you warranty (delete as appropriate)

I've asked Adamf over at Nokia discussions to investigate.. He seems very clued up on the N900 and maybe he can find out internally if both he and myself and many other users have suggested others void their warranty by re-flashing to fix problems.