I think this might be a problem with DNN interaction. And this is why:

1. If I leave the Feedback module there with Google AdSense code I get a javascript error.
2. If I remove the Google AdSense (GADS) code from the Text/HTML module the problem goes away but then no ads :(
3. Tried placing the GADS code in the following places, all with the same unsatisfying result: a) Module text (Source), b) Module header c) Module footer
4. The javascript error says something about a Sys.Format exception whereby the date is not in a recognized format.
5. Removed the Feedback module and left the GADS Text/HTML module with its GADS code and the problem was there.

I tried by setting the STart/End dates of the GADS module but that did nothing to resolve the issue. The Google code shown there (also here) has no date in it that would warrant such an exception.

<script type="text/javascript"><!--
google_ad_client = "pub-3050777595580571";
google_ad_width = 120;
google_ad_height = 600;
google_ad_format = "120x600_as";
google_ad_type = "text_image";
google_ad_channel = "9194798179";
google_color_border = "BAE55E";
google_color_bg = "FFFFFF";
google_color_link = "0000FF";
google_color_text = "000000";
google_color_url = "008000";
//-->
</script>
<script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>

Has anybody used Google AdSense in a standard DNN installation (no payware modules please) ?

Hi Jon,

    Just chedked my DNN 4.x Bin folder, there is a System.Web.Extensions.dll file that has the following properties:

File Version: 1.0.61231.0
Dll Version: 1.0.61025.0

So, according to this information my webhosts's DNN installation has the correct AJAX extensions DLL vversion. Perhaps the issue was not totally fixed.