Hi Alexander,
Ok, I fixed that script error in my copy. I was confused because there is an error in the documentation page
http://code.google.com/apis/analytics/docs/tracking/gaTrackingSite.html
All the examples at the top of the page show "enable" rather than "true", but examples toward the bottom show "true".
At your request I created a setting, you can add this to your user config and put in the url for your local script.
<add key="GoogleAnalyticsScriptOverrideUrl" value="" />
These changes will be in svn trunk by tonight.
Best,
Joe