just did my standard update-when-indicated (via apt-get update/upgrade in a 
terminal), and got this:

Failed to fetch 
http://ppa.quickbuild.pearsoncomputing.net/trinity/trinity-builddeps-r14.0.0/ubuntu/pool/main/libr/libr/libr0_0.6.0-3ubuntu12.04.0+1_amd64.deb  
Size mismatch

any idea what's up here?

thanks in advance for any advice.
-- 
dep

The shortest distance between you and playing great acoustic guitar:
the great new instructional DVDs from Marjorie Thompson, 
available at www.MarjorieThompson.com