On my website, I have a Flash page with thumbnails to play videos. When the user clicks on the thumbnail, it opens a player on top with the corresponding video.
The problem is, when this player is open on top, you are able to still click the links in the back window, even you can't see them. This is causing user to link to things by accident.
You can view my site at http://www.10fold.tv.
Click on the work button and then any thumbnail to open the video player, and you'll see what I"m talking about.