Am I the only one seeing underlined words?

[redhookmom]

In the body of posts I am finding certain words underlined when I move the mouse over the word it becomes highlighted and then a little ad pops up. What's with that?

Examples: "dusting" in the thread about household chores. "watches" in the how much tv thread.

[flagger]

You have a virus and possible a trojan horse. Download and run your favourite anti-viral program. You might want to download the latest edition of Ad-Aware www.lavasoft.de as well.