The standard code generated by codemanger for new sites contains the noscript tag
<noscript> <a href="http://www.omniture.com" title="Web Analytics"> <img src="http://<reportsuite>.122.2o7.net/b/ss/<reportsuite>/1/H.21--NS/0" height="1" width="1" border="0" alt="" /> </a></noscript>
The image is set to a 1*1 pixel.
However the image returned by Omniture is a 2*2 pixel. This image miss-match in size can cause errors to be returned when running automatic formatting checkers against your site.
The problem can be solved easily enough by changing the pixel size or removing the noscript tag, however it would be much better for all uses if the code in codemanager was updated to match the returned gif size.