^ Good Point! There are two tabs, one on each side, with a plastic cap on the end. If the caps come off (which is common) the top won't fit tightly. If that is the case, look here:
http://www.renntech.org/forums/index.php?showtopic=16366
and it will be the cheapest part you ever buy for your Boxster. I think there about $2 each from Sunset Imports.
I also get a few squeaks on bad roads, but on road trips and the freeway the hardtop drastically reduces wind noise.
