This is not a bug in Ubuntu Studio, but rather a misconfiguration problem with your personal /etc/apt/sources.list file. It appears you have a number of 64studio repositories listed there that are not registered properly on your computer. It's quite likely that any "sudo aptitude update" command will result in the same error on your system. To solve your problem, remove the three listed repositories from the /etc/apt/sources.list file.
For further info take a look at https://help.ubuntu.com/community/Repositories/Ubuntu or https://help.ubuntu.com/community/Repositories/CommandLine -- W: GPG error: http://www.mirrorservice.org 64studio Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1CC1348879ADCDD1 https://bugs.launchpad.net/bugs/491783 You received this bug notification because you are a member of Ubuntu Studio Testers, which is subscribed to Ubuntu Studio. Status in Ubuntu Studio: Invalid Bug description: I am trying to upgrade UBUNTU 9:10 to Studio 9:10 I run "sudo aptitude update && sudo aptitude install ubuntustudio-desktop ubuntustudio-audio ubuntustudio-audio-plugins ubuntustudio-graphics ubuntustudio-video linux-rt Then get this - and do not know how to get past it. W: GPG error: http://www.mirrorservice.org 64studio Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1CC1348879ADCDD1 W: GPG error: http://64studio.hivelocity.net 64studio Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1CC1348879ADCDD1 W: GPG error: ftp://ftp.mirrorservice.org 64studio Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 1CC1348879ADCDD1 _______________________________________________ Mailing list: https://launchpad.net/~ubuntustudio-testers Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-testers More help : https://help.launchpad.net/ListHelp

