Thanks for your point, Franklin.
My experience with DS-106e.
Those commands drop services and diskstation quit responding (web admin, telnet, ftp, ssh and so on), sometimes with ping still responding, but it locks-up with the blue led on and the green flashing.
Sometimes I have to manually power it off with 5-secs button pressure, sometimes I had to remove the power wall plug !!!
I first installed beta 0634 on previous 05xx and begun experiencing such poweroff / reboot problem. Never had before. Reported in proper beta support section.
Then I installed from scratch fw 0637 final on a new HDD, same disk station (I would try some experiment...). Same problem, actually only reboot sometimes worked with the original posture. Randomly. Poweroff never!
No hacks, SSH flag enabled only (I don't like telnet very much
... wireless network)
Finally I enabled the bootstrap hack, because someone told ipkg made those commands working fine. Not for me. Poweroff sometimes works, but now reboot seems a self-destruction command, as I do need to remove the power supply to obtain some response...
IMH point of view, something changed in the busybox shell since 06xx version...