Using non-async custom tracking code snippets causes tracking failure (0 visits)

hi, i recently upgraded our drupal from 6.16 to 6.19 and our google analytics module from 6.x-2.2 to 3.0 (and then a couple days later to 3.0-dev). i also updated a number of other modules at the same time.

after this, google analytics dashboard started showing 0 visits for our domains (we have just one Drupal installation which is multi-site, using the domain module (http://drupal.org/project/domain), but we don't set separate Google Web Property ID's for each site -- instead we just use one ID for all of them and then set filters at Google Analytics dashboard in order to view results for each domain separately).

we are running Fedora 9 with apache 2 and php 5.2.6.

i have checked that the google analytics code being generated by the module is correct, by running it through http://sitescanga.com , and it says that it is.

we do have some custom javascript "Code snippet (after)" code,

pageTracker._setDomainName(".example.com");

..which was the same before the upgrade, and which is still there (despite the message we got after the upgrade that we have to replace it).

so everything appears to be the same on our pages as before. the script IS being inserted, and everything looks fine. so i can't imagine what would be different unless somehow the drupal 6.19 is sending a slightly different response header or something, and Google thinks it might be a different machine now? but i haven't pursued that further.

here is our code (with ID and domain changed to protect the innocent) which shows up for all anonymous visitors:

<script type="text/javascript">
<!--//--><![CDATA[//><!--
var _gaq = _gaq || [];_gaq.push(["_setAccount", "UA-1234567-1"]);_gaq.push(["_trackPageview"]);pageTracker._setDomainName(".example.com");(function() {var ga = document.createElement("script");ga.type = "text/javascript";ga.async = true;ga.src = ("https:" == document.location.protocol ? "https://ssl" : "http://www") + ".google-analytics.com/ga.js";var s = document.getElementsByTagName("script")[0];s.parentNode.insertBefore(ga, s);})();
//--><!]]>
</script>

i was going to post this question on the Google Analytics help forum but I thought I'd post here first. would anyone have any ideas? i'd be most appreciative.