Second day now, apt-get update errors here (Squeeze):
W: GPG error:
http://ppa.quickbuild.pearsoncomputing.net squeeze
Release: The following signatures were invalid: BADSIG 43F1DC4F2B8638D0
QuickBuild Trinity Desktop Environment
W: Failed to fetch
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps-v3.5.1…
Hash Sum mismatch
David