Originally Posted by 273
I'm actually surprised it's this hard. My Firefox and Flash install consists of the Nightly build slapped into /opt and libflashplayer.so in ~./mozilla/plugins.
I do suspect a mismatch of 32 and 64 bit versions or similar.
Sorry this was perhaps wrong.
When you say that some videos work, are you sure they are Flash videos? If so then yes it may be you need a newer version.
That said, Flash should just work or not for most sites or come up with a message telling you to upgrade.