popping sound from front window

[fullthrottle52]

I jsut purchased a 2000 Boxster. I have been driving it now for about a month.

When I hip a small bump or sometimes just a seam in the pavement I hear a cracking sound. Almost like a stone hitting the front window. It happens almost all the time. It is a little scary because I keep looking up at the top of the window to see if a stone has hit it.

Is this coming from where the top meets the top of the window? I have checked and there is no metal hitting metal or anything like that. Does anyone else have this issue. It is not mechanical or electical, just a lound snapping sound.

Help anyone.

Thanks