Flash and Firefox 3.6. Should flash work for sites like YouTube?

[eculp]

I have just installed Firefox3.6 and reinstalled nspluginwrapper-devel  
a have run  nspluginwrapper -v -a -i but YouTube still gives me the:

Hello, you either have JavaScript turned off or an old version of  
Adobe's Flash Player. Get the latest Flash player.

message.  Do I need to do something more than I did with 3.5?

Thanks,

ed