Well, I tried all the things we talked about, but sadly no dice. Changing audio applications to output to "Default" made no difference, and all variations of your script sadly made no difference. I uninstalled flash 10, tried to install flash 10.1, but sadly, it turns out there will only be a 32-bit version pf 10.1, and moving the libflashplugin.so into /usr/lib64/mozilla/plugins did nothing, so I reinstalled flash 10, and will be waiting for the next 64-bit version to come out.
I hope you have a nice holiday, thanks for trying to help. This is a very odd problem...