When you have say more then one file or something open or window (not tabs), the windows 7 task bar combines or stacks them on top of each other. Well my chrome started to do that with tabs. It looks like I have more then one chrome window open, but its just tabs all in one window. So when I click on the stacked chrome on my task bar it shows a preview of each tab and then goes to that tab. I would much rather have it be one chrome icon rather then stacked and then I can select my tab. The preview for the many tabs I have open is annoying me. I know this has to be something I accidental turned on because it did not do this before nor does it do it on my other computers.