Sounds stop in videos since v 11.7.700.169 of Adobe Flash Player on Firefox

Hi,

Since 11.7.700.169 of Adobe Flash Player for Firefox on windows, sounds on streaming videos (youtube, Vimeo, etc...) stop about 2 seconds after the beginning.

Is someone have the same probleme?

I try to found and install an older version to see if the problem still exist but i dont found any (installers allways download the last one...).

thanks for help.

-Slyp-