Left 4 Dead on Windows 7

Left 4 Dead seems to work ok for me in Windows 7, but I sometimes get red writing in the top right hand corner that says "autodisconnecting in ..." and there is a countdown in seconds. Do other people get this when gaming online, or is this a beta bug?

Don't worry about it I get that sometimes in Vista, it happens about 5% of the time when I try to connect to a game. I think it has something to do with lag, or the server.