This filter rule disables the floating popup on those green colored words on MSNBC website.
http://*.intellitxt.com/ast/js/*
These are the most used filters for other popular sites:
http://harvest*.adgardener.com/ <-- Kills Drudgereport ads
http://*.atdmt.com/
http://*.doubleclick.net/
http://us.i1.yimg.com/us.yimg.com/
http://pagead*.googlesyndication.com/
http://spotlight.accuweather.com/