Continuous talpa warnings for tmpfs on Xbuntu 12.04

 Hi,

I have a continuous flow of Linux kernel warnings, like the following ones:

[14571.156420] talpa-vfshook: talpaRelease: filename=NULL: fstype=tmpfs
[14571.157390] talpa: talpa__d_path: kenel_d_path returned NULL
[14571.158024] talpa:       file deleted
[14571.158990] talpa:       basename=drm mm object

What is very strange is that all of them are referred to the tmpfs file system type which is excluded from the scanning process:

$ sudo /opt/sophos-av/bin/savconfig --all query
...
ExcludeFilesystems: nfs
                                      tmpfs
                                      cifs
...

Where is the problem? What can I do to stop these warnings?

About my system:
$ uname -a
Linux AOA-110-Bb 3.2.0-57-generic #87-Ubuntu SMP Tue Nov 12 21:38:12 UTC 2013 i686 i686 i386 GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID:    Ubuntu
Description:    Ubuntu 12.04.3 LTS
Release:    12.04
Codename:    precise
$ sudo /opt/sophos-av/bin/savdstatus --version
Copyright 1989-2013 Sophos Limited. All rights reserved.
Sophos Anti-Virus       = 9.5.0
Threat detection engine = 3.48.0
Threat data             = 4.96
Threat count            = 6151994
Threat data release     = Wed 11 Dec 2013 12:00:00 AM
Last update             = Fri 27 Dec 2013 04:11:57 PM CET

Thanks for your help,
Kuba