Sometimes flash plays youtube videos and other audio/video web apps ok, sometimes it only reproduces with very fast audio or stuck sound with no problems on video. This has happened to me before with other builds and is not easily reproduceable, although it occurs more than once a week. When this happens, Firefox is running ok. I'm using www-plugins/adobe-flash-10.1.82.76, with nspluginwrapper, as AFAIK there's no 64bit version currently available. Reproducible: Always
For your info. There is a newer flash version for 64bits again. adobe-flash-10.2.161.22_pre20100915
Thanks. I'll try it out and report back if I see this problem again.