Mounting error after upgrading to wheezy - Changes in mount.cifs from 4.5 to 5.5?

[Philipp Flesch <philipp-3cc/OM5pcIkb1SvskN2V4Q@public.gmane.org>]

Hi from Munich,
we have some special issues with the current cifs-utils (5.5) in 
Debian Wheezy.

A lot of our (raw) logfiles are stored on a Windows 2008 R2 
fileserver, while we use Debian to generate the reports.

The share is available as
\\fs01\Share

while the logfiles can be found in special subdirs
DepartmentA\Stats

We use a seperate user "stats_user" to access the files. This user has 
no "listing-rights“ above the final "\Stats" directory.

Using Windows 7, everything works fine...
\\fs01\Share\DepartmentA\Stats can be directly mounted to an local 
drive...

Using cifs-utils (4.5) in Squeeze everything works fine, too!
mount -t cifs //fs01/Share/DepartmentA/stats /mnt/DepartmentA_stats -o 
user=stats_user,domain=xy,password='xyz'
makes all files accessible from Debian.

Using the same mount-command with the same user, we got a "permission 
denied".
Retrying with a default-user (with listing-rights) the subdirectory is 
mounted without any errors...

Are there any big changes between 4.5 and 5.5 which can cause this 
error? Is there a solution, to avoid the issue?

Thank you very much

Philipp