I just got your mail, Bill - thanks!
This is due to a change in the upstream package.
I've just posted a new one that checks the version of the shared library inside the tarball, and if it's not what the script expects, prints a warning. This should at least give some clue in case this happens again
In the meantime (until we can get it checked out and pushed at SlackBuilds.org), you can get a script for the new version from here:
http://rlworkman.net/flash-player-plugin.tar.gz (complete tarball)
http://rlworkman.net/flash-player-plugin/ (browse files)