Any problem with PPA's ?

Hi, First, I use Trinity since the begining and I'm under 3.5.12 on a Debian Squeeze machine and it works like a charm since then. It's been a fantastic work and I'm so glad I can still use Kaffeine and some KDE "real" stuffs. Though, since a time I have some concerns with the ppa repositories. I've just tried the 3.5.13 versions of them but still there are some issues. I followed the "how to" for Oneiric under Linux Mint LISA and Debian Squeeze (under Debian Squeeze, of course). Did I miss something ? Errors description (sorry some sentences are in french) for both systems are following. Of course if any other information is needed, feel free to ask for it. Thanks in advance for any clue and happy new year. Keep Up Here are lines of error when executing apt-get update : under LISA (Mint 12) : Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main TranslationIndex Err http://ppa.quickbuild.pearsoncomputing.net oneiric/main Sources 404 file does not exist Err http://ppa.quickbuild.pearsoncomputing.net oneiric/main amd64 Packages 404 file does not exist Err http://ppa.quickbuild.pearsoncomputing.net oneiric/main i386 Packages 404 file does not exist Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-fr_FR Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-fr Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-en Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-fr_FR Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-fr Ign http://ppa.quickbuild.pearsoncomputing.net oneiric/main Translation-en 147 ko réceptionnés en 45s (3 205 o/s) W: Impossible de récupérer http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu/d… 404 file does not exist W: Impossible de récupérer http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu/d… 404 file does not exist W: Impossible de récupérer http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu/d… 404 file does not exist And here are them under Debian Squeeze : Ign http://ppa.quickbuild.pearsoncomputing.net squeeze/main amd64 Packages Err http://ppa.quickbuild.pearsoncomputing.net squeeze/main Sources 404 file does not exist Err http://ppa.quickbuild.pearsoncomputing.net squeeze/main amd64 Packages 404 file does not exist N: Ignoring file 'getdeb.list.save' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension W: Impossible de récupérer http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/debian/d… 404 file does not exist W: Impossible de récupérer http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/debian/d… 404 file does not exist