Does your Adobe Flash Player icon in the KDE System Settings malfunction?
The library is installed in the wrong location on Fedora 15 64-bit machines. Here is how to fix it.
~@karen.dragonfear α: sudo ln -s /usr/lib/kde4/kcm_adobe_flash_player.so /usr/lib64/kde4/kcm_adobe_flash_player.so
That is: become root, then link the library into /usr/lib64/kde4
Update: this fix doesn't work if you have Flash Player 10 32-bit installed on your system. Install the Flash 64-bit for Linux version 11 RC1, and then, after deploying all the files that come in the tarball in the right places, perform the above fix.