Comment 21 for bug 246205

Shirsh, that doesn't quite work for me. A few commands there are invalid and don't work.
But, the good news is that I did get it working this way:

cd /var/lib/boinc-client/
sudo mv ca-bundle.crt ca-bundle.crt.old
sudo wget http://boinc.berkeley.edu/trac/browser/trunk/boinc/curl/ca-bundle.crt?format=raw
sudo mv ca-bundle.crt?format=raw ca-bundle.crt

Then reboot, you may need to detach from wcg in the boinc manager, then (re)attach to WCG.