hi been reading up about blueman so I tried to follow this viewtopic.php?f=49&t=15575
but i keep getting this error now W: GPG error: http://ppa.launchpad.net
intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6B15AB91951DC1E2
W: You may want to run apt-get update to correct these problems
any one got any suggestions?