Home shares are mounted with just a line in fstab (tht is, at boot time), with
default options. I have tried also using autofs, with the same results.
The problem happens when I open an app that uses gconf, and then shut down via
the gnome GUI. In the shutdown messages, I see "Killing all remaining
processes" return "failed", and then the system hangs up in the last message,
"Will now halt". After a while, it appears a message "CPU #0 stuck for 61s"
that repeats indefinitely, until I use AltGr+SysRq+REISU and press the power
button (It doesn't respond to the last B of the sequence, although it responds
to the others).
I have tried it on two different computers, with exactly the same results. If I
don't open any app that uses gconf, or give it enough time to shut down, the
system halts normally.