I don't want to hijack this post but this news story has information that is too important for me not to share. Also it sounds as it you may not need to go on online dating sites to be targeted if your Facebook settings are public and you are of a certain age. Scary but knowledge is power.
Lynne, Mine does too, after a while. I've figured out it's always caused by the pop up ads displayed at the bottom of the page, especially those with video in them.