WordPress Preview urls show in error reports

Since I upgraded to 3.0.1 I have noticed that each time I create a new post and preview it (before publishing), while it works fine in wordpress, the temporary preview url appears as an error in my google adsense diagnostic report. This happens with every new post I create and preview. However, it has only begun since I upgraded wordpress. It’s as if the url generated by wordpress for the preview is being viewed other places as an error on my site. Anyone experience anything similar or have any feedback on how I might be able to troubleshoot? Or is it really not a big issue? Here are examples of the urls that are showing on my adsense error reports:

?p=957&preview=true
?p=946&preview=true

Any insight is greatly appreciated!