I have had other strange things with flash 10 though.
With thread on web cams and microphones and the cookies it stores I set my system up to get rid of them and deactivated the web cam etc.
Now quite a few things which used to work fine have stopped working and hang the browser tab.
My suspision is that the advert's in PPrune are causing you grief. If you install an ad blocker that should solve your problem.