64bit flash

I'm new to the list, but I was just wondering why rpmfusion uses nspluginwrapper for flash on 64bit when there's a 64bit flash out? Sure, it's beta, but in my experience it's much more stable than the nspluginwrapper/flash combo. For example, if I had several tabs open with flash video, nspluginwrapper would crash, native 64bit flash doesn't. Are there other issues with the 64bit flash beta that I'm not aware of?