Apt-get errors

L.S. When updateing debian wheezy on amd64 with apt-get or aptitude I get this error: GPG-error: http://ppa.quickbuild.pearsoncomputing.net wheezy Release: The next signatures were invalid: BADSIG 43F1DC4F2B8638D0 QuickBuild Trinity Desktop Environment. Ophalen van bzip2:/var/lib/apt/lists/partial/ppa.quickbuild.pearsoncomputing.net_trinity_trinity-builddeps-v3.5.13_debian_dists_wheezy_main_binary-amd64_Packages has failed Hash-sum does not match. Is this a matter of time and patience or a real error? -- Roel Wagenaar, Linux-User #469851 with the Linux Counter; http://linuxcounter.net/ Antw.: Omdat het de volgorde verstoord waarin mensen tekst lezen. Vraag: Waarom is top-posting een slechte gewoonte? Antw.: Top-posting. Vraag: Wat is het meest ergerlijke in e-mail? Always remember you're unique, just like everyone else.