gvfs: fails to mount certain removable devices

["Richard B. Kreckel" <kreckel ginac de>]

After a system upgrade (Debian/squeeze with gvfs 1.6.4 to Debian/wheezy 
with gvfs 1.12.3), some (but not all!) USB sticks aren't automatically 
mounted any more when plugged in.

I tried gvfs-mount -oi and noticed that the devices that are getting 
mounted have keys
can_mount=1
can_eject=0
should_automount=1
whereas the devices that are not getting mounted have keys
can_mount=1
can_eject=1
should_automount=0

I tried to debug and find out the place where should_automount is set to 
FALSE but so far had no luck. Any hint what to do, where to look, how to 
debug, is very much appreciated.

(I've also reported this as Debian Bug#692805.)