Each time a browser tries to show flash content something crashes. E. g. with Firefox I get this message:
Process /usr/lib/xulrunner/plugin-container was killed by signal 4 (SIGILL)
Flash content is never displayed or heard.
Software:
Fedora Linux 18 KDE Spin 32bit
firefox.i686 19.0.2-1.fc18
xulrunner.i686 19.0.2-1.fc18
flash-plugin.i386 11.2.202.275-release