I dunno about normal but thats how it is for me, i get solid 60 FPS without Fraps running, while its running it gets cut down to a 30 normal but will sometimes be droping to 15 DPS for a second then back to 30 so its a little chopy but easily still playable.
After you go back into the Fraps folder and watch it in fullscreen its perfectly clear and smooth, although sometimes it kind of slows down a little in a real laggy spot. I turned down some graphics ingame and it seemed to go away completly though.
So i pretty much get the same kinda of thing
