dpkg error when running apt-get upgrade.

[kriticar]

(25th Sep, 2013 09:03 PM)IriDium Wrote:  I'd change your sources back to the standard and then run as root;

apt-get clean;apt-get update;apt-get -s upgrade

and post the results if there any errors. If none, apt-get upgrade.

After sudo apt-get clean; sudo apt-get update I got:

pi@rpi:~$ sudo apt-get clean; sudo apt-get update
Get:1 http://archive.raspberrypi.org wheezy Release.gpg [490 B]
Hit http://mirrordirector.raspbian.org wheezy Release.gpg
Hit http://archive.raspberrypi.org wheezy Release
Hit http://mirrordirector.raspbian.org wheezy Release
Get:2 http://xbian.dehakkelaar.nl/ wheezy Release.gpg [3,639 B]
Hit http://archive.raspberrypi.org wheezy/main armhf Packages
Hit http://xbian.dehakkelaar.nl/ wheezy Release
Err mirror://apt.xbian.org wheezy Release

Hit http://mirrordirector.raspbian.org wheezy/main armhf Packages
Hit http://mirrordirector.raspbian.org wheezy/contrib armhf Packages
Hit http://mirrordirector.raspbian.org wheezy/non-free armhf Packages
Hit http://mirrordirector.raspbian.org wheezy/rpi armhf Packages
Ign http://archive.raspberrypi.org wheezy/main Translation-en_US
Ign http://archive.raspberrypi.org wheezy/main Translation-en
Ign http://mirrordirector.raspbian.org wheezy/contrib Translation-en_US
Ign http://mirrordirector.raspbian.org wheezy/contrib Translation-en
Ign http://mirrordirector.raspbian.org wheezy/main Translation-en_US
Ign http://mirrordirector.raspbian.org wheezy/main Translation-en
Ign http://mirrordirector.raspbian.org wheezy/non-free Translation-en_US
Ign http://mirrordirector.raspbian.org wheezy/non-free Translation-en
Ign http://mirrordirector.raspbian.org wheezy/rpi Translation-en_US
Ign http://mirrordirector.raspbian.org wheezy/rpi Translation-en
Fetched 4,129 B in 4s (977 B/s)
Reading package lists... Done
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: mirror://apt.xbian.org wheezy Release: The following signatures were invalid: NODATA 1 NODATA 2

W: Failed to fetch mirror://apt.xbian.org/mirror.txt/dists/wheezy/Release

W: Some index files failed to download. They have been ignored, or old ones used instead.

Does anyoune know what would be the reason?

Regards.