hi, I have fount this news: http://labs.adobe.com/downloads/flashplayer10.html

and this info: http://www.myscienceisbetter.info/64bit/

then, on my last F10-x86_64 desktop, I have install the last PreRelease of Macromedia Flash Player x86_64 with this procedure:

#!/bin/bash set -x flashpage='http://labs.adobe.com/downloads/flashplayer10.html'

flashurl=$(wget -q $flashpage -O - | grep 'Download 64-bit Plugin for Linux'| sed -e 's/.*a href="//' -e 's/".*//')

flashfile=$(basename $flashurl)

destplug=/usr/lib64/mozilla/plugins/

test ! -f $flashfile && wget -c $flashurl

tar -xvzf $flashfile -C $destplug

exit

Work for me.

Someone have something better?

hope this help

thanks