Yes, that is very possible. I took that phone out after my wife's regular N900 went bad, punched update which included CSSU.
Maybe the next update fill fix me since the fstab matches my good phone. Sadly flashing is not an option.
SInce the wife is not a power user I can SSH in and use midnight commander as sudo to FTP her music and files back on, though she was used to using a SCP connection to drag/drop music or pictures.
It is a pain and I hope to fix the problem for her.