A method to see what SDC is sending to the SDC server copy and paste the following script into the address bar and press enter.

javascript:alert(dcsInit.images[0].src);

To make a printable view

javascript:document.write(dcsInit.images[0].src);

The article also suggests, that if the above javascript does not return any results, use the following code for earlier versions of SDC tagging.

javascript:alert(gImages[0].src);
javascript:document.write(gImages[0].src);

Note: I have tested on a version 8 Webtrends with success.

Source: http://www.webmasterworld.com/analytics/3648911.htm