Mirrors - strange errors.

Hello, everyone! For the last 24c hours approx I can update from the mirrors and I can upgrade, but installation of a package (k3b-trinity) gets this far (no 404s): Setting up cdparanoia (3.10.2+debian-9) ... Setting up cdrdao (1:1.2.3-0.1) ... Setting up genisoimage (9:1.1.11-1) ... Setting up dvd+rw-tools (7.1-6) ... Setting up k3b-data-trinity (4:3.5.13-0debian9+r1258943+pr3~squeeze) ... Setting up libartsc0-trinity (4:3.5.13-0debian9+r1261050+pr3~squeeze) ... Setting up libflac++6 (1.2.1-2+b1) ... Setting up wodim (9:1.1.11-1) ... E: Failed to fetch http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/debian/p…: 403 Forbidden root@Hercules:/home/peter# and attempts to install Trinity (as opposed to single packages) get 404 on everything from the beginning. And why the 403? Are we perhaps being rationed in some way? Lisi