With all due respect, that hardly "bricking" your N800. "Bricking" implies that your N800 cannot start up anymore, requiring it to be sent to Nokia for service. Having to remove the battery does not make it "bricked."

As for your problem, could you be a little more descriptive? After you installed the update, did it crash your N800 immediately (i.e. before you even started it), upon startup, or after using it for a few minutes? What other applications did you have open (e.g. Control Panel, Maps, Application Manager, web browser, etc.) ?

Also, what are the contents of the file at "/var/lib/dsme/stats/lifeguard_resets" ? Have you restarted the device since you removed and replaced the battery? If not, what are the contents of the file at "/proc/bootreason" ?

Thanks for the report.