On Saturday, September 29th, 2012, at 13:44:05h -0400, kcGSH6nC pondered:
> Sounds like your HAL configuration is borked.
XFCE has not used HAL since release version 4.8
<
http://gezeiten.ORG/post/2011/01/Xfce-4.8-released!>
udev is now used for device detection so it is the udev
rules which need to be considered for possible modification
and setting the group ownership appropriately and/or
looking at the mount command by thunar and setting the
necessary group permission or group mask in the mount
command.