Keys

I get the following error when running synaptic: --------------------- W: GPG error: http://www.debian-multimedia.org wheezy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 07DC563D1F41B907 W: GPG error: http://ppa.quickbuild.pearsoncomputing.net squeeze Release: The following signatures were invalid: BADSIG 43F1DC4F2B8638D0 QuickBuild Trinity Desktop Environment ---------------------- what's the best way of fixing it? cheers ant -- Sent from my linux system running Debian 6, desktop trinity-KDE. This email is plain text, not HTML. Any attachments are either .jpeg or .pdf