Hi,
I got some problems n900 and i hope you guys can help me

Am getting an apt-get error. When i try to update i get an error saying

W: GPG error: http://repository.maemo.org fremantle Release: The following signatures were invalid: BADSIG E40DC43461673OBD maemo.org Extras repositories (Fremantle Extras) <repositories@mameo.org>
You may want to run apt-get update to correct these problems.

Do anybody know whats wrong?? am not so good with terminal just so u guys know, I will need a step by step guide if am going to do anything in xterminal And I have also tryed re-adding the repo but still same problem