I flashed the N800 on saturday and did not have any problems.
I have two 2Gb SD memory cards which work fine and did a restore
from backup, no problems what soever. I installed MaemoMapper,
ssh-server/client, FM-readio and my own progs, no problem what soever and best of all:

My touchscreen right edge sensitive problem is gone, sensitivity
over the whole screen area is excellent now! Needless to say,
I am very happy with the upgrade!