I think you have an addon on or something running on your comp your not aware of cause I don't get that when I mouse over you pic nothing happens.
You can get a free program called C-Cleaner (Crap Cleaner) that will remove cookies and unwanted junk files. I thought you were talking about the margin adds that pop up when you run the mouse over them. Took me forever to develop my coordination with my mouse to avoid them without thinking about it. I won't say that that will solve this specific problem but it might.