unable to mount removable media with xfce4 version 4.10.1

[François Patte <francois.patte@mi.parisdescartes.fr>]

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Bonjour,

Since last upgrade, I cannot mount (or umount) any removable media
under xfce4:

I can see the icon on the desktop, mouse over indicates that the media
is not mounted and if I ask (mouse left click) to mount them the
answer is: not authorized operation....

Yes, I have thunar correctly configured....

Strangely, I can mount CD and DVD using xfce mount plugin but this one
does not show usb disks or sticks....

Any clue? (debian sid updated).

Thanks

- -- 
François Patte
UFR de mathématiques et informatique
Laboratoire CNRS MAP5, UMR 8145
Université Paris Descartes
45, rue des Saints Pères
F-75270 Paris Cedex 06
Tél. +33 (0)1 8394 5849
http://www.math-info.univ-paris5.fr/~patte
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