wow didn't know that this is actually possible on N900
great job guys

and @pablocrossa
i don't think that the hardware revision is the problem
maybe it is from chroot
try reinstalling it
apt-get install easy-chroot

or from bash it self

try to install bash3

apt-get install bash3

and make it your
default shell
by

bash-setup

NOTE : HAVEN'T TRY TO REVERSE TO THE DEFAULT N900 SHELL
hope it helps