Following the instructions for "For Precise [Ubuntu 12.04] LTS (v3.5.13.1)" from:

 http://www.trinitydesktop.org/wiki/bin/view/Documentation/UbuntuBinaryInstallation.

I got these "Failed to fetch" messages with "apt-get update":
-----------
From: http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-v3.5.13/ubuntu/dists/quantal/main/

source/Sources
binary-amd64/Packages
binary-i386/Packages

Error:  404  Not Found

From: http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps-v3.5.13/ubuntu/dists/quantal/main

/source/Sources
/binary-amd64/Packages
/binary-i386/Packages

Error:  404  Not Found
----------

I assume this is why I got so many "unmet dependencies" when I tried "apt-get install"

Is there something wrong with the repository or is it something on my end...?

ALSO:

I am trying to install Trinity on Lubuntu 12.04.  Lubuntu was a fresh install on a blank drive and has not been modified since the install.

Will using Lubuntu instead of Ubuntu, be a problem?

Keith