[PROBLEM] Problem during apt-get update

[mikkelnl]

Hi all, 1st time poster so not 100% sure if this it the correct subforum

Anyways, I regularly run apt-get update / upgrade, but now I get this error when I run apt-get update:

Quote:xbian@xbian ~ $ sudo apt-get update
[sudo] password for xbian:
Hit http://mirrordirector.raspbian.org wheezy Release.gpg
Get:1 http://apt.xbian.org stable Release.gpg [473 B]
Hit http://mirrordirector.raspbian.org wheezy Release
Hit http://apt.xbian.org staging Release.gpg
Hit http://apt.xbian.org stable Release.gpg
Hit http://apt.xbian.org staging Release.gpg
Hit http://apt.xbian.org stable Release
Hit http://apt.xbian.org staging Release
Hit http://apt.xbian.org stable Release
Hit http://apt.xbian.org staging Release
Hit http://mirrordirector.raspbian.org wheezy/main Sources
Ign http://apt.xbian.org stable Release
Hit http://apt.xbian.org stable/main armhf Packages
Hit http://mirrordirector.raspbian.org wheezy/contrib Sources
Hit http://mirrordirector.raspbian.org wheezy/non-free Sources
Hit http://mirrordirector.raspbian.org wheezy/rpi Sources
Hit http://mirrordirector.raspbian.org wheezy/main armhf Packages
Hit http://mirrordirector.raspbian.org wheezy/non-free armhf Packages
Hit http://apt.xbian.org staging/main armhf Packages
Hit http://apt.xbian.org stable/main armhf Packages
Hit http://apt.xbian.org staging/main armhf Packages
Ign http://apt.xbian.org stable/main Translation-en_US
Ign http://apt.xbian.org stable/main 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://apt.xbian.org staging/main Translation-en_US
Ign http://apt.xbian.org staging/main Translation-en
Ign http://apt.xbian.org stable/main Translation-en_US
Ign http://apt.xbian.org stable/main Translation-en
Ign http://apt.xbian.org staging/main Translation-en_US
Ign http://apt.xbian.org staging/main Translation-en
Fetched 473 B in 30s (15 B/s)
Reading package lists... Done
W: GPG error: http://apt.xbian.org stable Release: The following signatures were invalid: BADSIG 5D3294C2529968ED CurlyMo <development@xbian.org>

Any idea what causes this?

Thanks!