Something else to check - also see Cause for apparent Web Shield blocking internet connection, http://forum.avast.com/index.php?topic=57443.0. Now I don’t know if this might be the cause, but if the web shield was working previous to this installation then it probably isn’t.
Uninstallled, manually removed leftover folders, reinstalled with defaults i.e previously I did custom install & this time I did default install but still WebShield showing 0/0.