The "missing library symlinks after a reboot" bug in OZ 3.5.1 is known and has been fixed in
recent builds.
To fix the problem, you can do
mv /etc/rc2.d/S04sd /etc/rcS.d/S38sd
(um actually, i'm not too sure about S04sd, it could be S02sd. I don't have a ROM to check ATM, sorry)
HTH