My system: Old Emac, PPC, 10.4.8 and use primarily Safari as a web browser. I
had a tough time to get Flash Player, version 9.0.28.0 to work. I finally got
it to work by using TextEdit to modify the
User/Library/Preferences/Macromedia/Flash Player/version.txt file. I noticed
that the file provided by the installed said,"9.0.27.0", and not 9.0.28.0".
After changing the 27 to 28 and saving the text file, the new plug-in seems to
work.