Hey folks not sure if this will help, I recently had to setup a new system with FC13 86x64 and of course faced the same flash64 install problems as everyone else. nspluginwrapper didn't see to work for me in wrapping the 32-bit version of flash into both Firefox and Chrome. I ended up grabbing the discontinued version of 64-bit flash and using that and it worked great for me. I wrote a short procedure for a friend who was having the same problem and here it is (sorry if this was already covered):
-- Installing true 64-bit flash player on a linux/fedora-13x64 box --
NOTE: This is a manual install for this plugin. The actual 64-bit linux plugin for flash has been discontinued and it is unknown when adobe will release a new version. Lucky for us, people saved the last version that did in fact work quite nicely at least in fedora with a firefox and chromium.
WARNING: Flash 64bit was discontinued for security reasons! This is that same discontinued version so use at your own risk!
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-2) You might want to first remove the old libflashplayer.so files (probably 32-bit) from your disc before you do this. First open a terminal and make yourself root:
$ su
<password>
-1) Find all copies of this file on your HDD:
# find / -name libflashplayer.so
0) Now you have a list of all places this file is, to remove each of them do this:
<CTRL-SHIFT-C the file name for one of them>
# rm <CTRL-SHIFT-V the full path & filename>
<y>
<repeat for each file>
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1) open a browser and go to this page:
http://linux.softpedia.com/get/Inter...ux-42958.shtml
2) click download, then the click tar.gz file to actually DL this file, its a saved copy if the now discontinued 64-bit flash player for linux. This file ends up in your Downloads directory.
3) Open a terminal window.
4) Make yourself root:
$ su
<password>
5) Make sure your remove flash player and nspluginwrapper if you have it installed already, if its not installed it won't do anything:
# yum remove flash-plugin nspluginwrapper
UPDATE: also make sure you remove pulse audio or any other audio packages you might have installed for flash sound. I never had these in to begin with but noticed some procedures recommend you install them. Sound just worked for me with this procedure here and I never installed them.
6) Now click Places > Downloads to open the downloads directory, in this dir you should see the archive you just downloaded, its a *.tar.gz file. In the GUI you can just open this and click extract to extract the correct 64bit libflashplayer.so file right into the Downloads directory. You could also unpack it at the cmd line.
7) All you need to do from here is copy this libflashplayer.so file into the right directory for your browser, each browser you have installed will need a copy of it. Also you need to make sure the file permissions for this file are such that anyone can use it (normally not needed but just make sure).
--- FIREFOX ---
8) make sure firefox is closed
9) Copy the plugin to the right dir:
# cp ~/Downloads/libflashplayer.so ~/.mozilla/plugins
10) make sure file permissions are set so anyone can use this file:
# cd ~/.mozilla/plugins
# chmod a+rw libflashplayer.so
# chmod a-x libflashplayer.so
(note that last command not really needed, it just makes it so you can't execute the file like a program)
11) Open firefox and enter "about

lugins" in the address field, check to make sure shockwave flash is installed, then go to youtube.com and try to view a video to see if it worked.
--- CHROMIUM BROWSER ---
8) Chromium is my favorite browser. To install chromium you need to first install the repo file to your repos directory (covered in notes section), then:
# yum install chromium
9) make sure chromium is closed
9) Copy the plugin to the right dir:
# cp ~/Downloads/libflashplayer.so /usr/lib64/chromium-browser/plugins
10) make sure file permission are set so anyone can use this file:
# cd /usr/lib64/chromium-browser/plugins
# chmod a+rw libflashplayer.so
# chmod a-x libflashplayer.so
(note that last command not really needed, it just makes it so you can't execute the file like a program)
11) Open chromium and enter "about

lugins" in the address field, check to make sure shockwave flash is installed, then go to youtube.com and try to view a video to see if it worked.
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UPDATE: Sometimes SELinux conflicts with flash player. You might want to disable SELinux while you perform some testing to see if flash really works, then enable it after and retest flash again.
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NOTES:
Add the chromium repo so you can yum install chromium-browser:
make yourself root
# cd /etc/yum.repos.d
# gedit chromium.repo
now paste this (between the ---) into the file and save it (make sure saved as filename: chromium.repo)
--------------------------
[chromium]
name=Chromium Test Packages
baseurl=http://spot.fedorapeople.org/chromium/F$releasever/
enabled=1
gpgcheck=0
--------------------------
quit gedit and you're done, you can check file contents with:
# more chromium.repo
now you can install chromium
# yum install chromium
Good luck!
jerry