I have updated the 3.6.1-pi kernel to version 3.6.3-pi, by applying the two incremental patches from kernel.org.. patch-3.6.1-2 and patch-3.6.2-3.
$ uname -a
Linux rgpi 3.6.3-pi #1 Mon Oct 22 21:02:54 BST 2012 armv6l armv6l armv6l GNU/Linux
I have found a rather perverse feature of the Pi… If you want to shutdown and halt, using the # shutdown -h now or # poweroff commands, the system will shutdown and then immediately re-boot .
If you want the system to shutdown and reboot, using # shutdown -r now, it will shutdown and attempt to reboot, and fail:
# shutdown -r now
EXT4-fs (mmcblk0p2): re-mounted. Opts: (null)
Reboot failed — System halted
So – to reboot, use the halt command, and to halt, use the reboot command!
Update: FYI.. The incremental patches are at ftp://ftp.kernel.org/pub/linux/kernel/v3.0/incr/