Completely uninstall any old flash plugin and reinstall new flash. The following worked for me in Ubuntu:
sudo apt-get remove --purge flashplugin
sudo add-apt-repository ppa:sevenmachines/flash && sudo apt-get update && sudo apt-get install flashplugin64-installer
I'm seeing the same thing occur on my splunk server. splunk-4.1.7-95063.x86_64