Insight SM's hidden window
I have experienced the same problem. In my case it might be due to Nielsen NetRatings. Are you a participant?
Nielsen Media Research, a company of VNU N.V., is a pioneer in audience measurement and has been a leader in the television audience measurement industry for over a half century. Nielsen Media Research creates and maintains panels from which Internet data is collected via Insight(SM), Nielsen//NetRatings' proprietary measurement software. The combination of Nielsen Media Research's audience measurement expertise and NetRatings' technology yields the highest-quality information currently available on Internet use in these countries.
The Nielsen//NetRatings Internet audience panel is collected via random digit dial (RDD), a proven method for developing high-quality, representative samples. As the Internet and television media converge, television audience data from Nielsen Media Research and Internet data from Nielsen//NetRatings will help customers understand how these media are being used separately and in combination to deliver news, information, and entertainment for electronic commerce. For more information, visit
www.nielsenmedia.com.