Ok, so from my limited knowledge,it could be this:
wXXw.thevenusproject.com/templates/thevenusprojectlight/js/jquery-tooltip/lib/jquery.dimensions.js
At the end of this file, it appears as though there is a long script on one line that doesn't seem to belong there...
However I could be wrong, and would like an avast! team member to confirm/deny...
Scott
EDIT: Judging from the results of the latest test, it would appear that I was correct. See how the code unpacks to the site that is in the network shield alert.
Also, I will report this to avast! since the web shield hasn't caught the script, as is usually the case.