Hello,
i reinstalled my OS just recently and all system components including browser and Flash Player (11.8.800.94) as well, of course.
Just briefly after the installation i noticed there was no longer an option to "Stop downloading video" as used to be before. At first i was annoyed and i thought it concerned only me, but on the search for solutions i stumbled over this thread: http://productforums.google.com/forum/#!topic/youtube/7AMubhSadeY[1-25 -false].
Moreover i experience loading problems with YouTube content which i solely blame on the removal of this feature. While of course i am in no position to demand anything i would appreciate if you'd consider reenabling it in a future release. In the meantime.. could you please make a previous version available for download?
Pleeease? 
Kind Regards
Sniperturtle