Vantage 6.10.541 phantom/floating menu

We are currently running Vantage 6.10.541 and are experiencing a very strange phantom/floating menu phenomenon all of a sudden. When users log into the system, they see a piece of the list view menu floating in the middle of the screen. I can make that piece disappear by checking/unchecking the items in the view menu, but it seams to always come back when the users log out and log back into vantage. What's funny is that this little menu piece is actually functional and contains scolling arrows on the right side allowing the users to scroll through the menu items. Has anyone else experienced something like this and fixed it? A little hard to articulate so I can provide a screen shot if you'd like to see.