further investigation leads the problem to wlan_sleep_timeout setting. It looks like that my n800 can not use this function, I was forced to disable any kind of energy saving to prevent further crashes. Now my n800 is downloading/uploading torrents and downloading flash streams from youtube (just limited testing so far - 30 minutes - but much more than before). Anyway this is not an acceptable long term solution, my tablet drains the battery much faster and it is hot as it has never been (not burning but noticeable).

Does any of you saw this behavior?

best regards,
Mattia