For those of you who aren't aware of it, there's a public beta version of Flash Player 9 available. Please only post here, if you have already had experience with the beta plugin (not whether you will try it, don't intend to, or whatever).
If you want to test the beta version, you have to uninstall your current flash plugin and then install the beta version (the uninstaller and the installer for the new plugin can both be found from the link above).
Keep in mind that if you DO install the beta plugin, flash submissions which would otherwise have worked fine in previous plugin versions, might appear to be buggy. In these cases (if you're using the beta plugin), please report problems in this thread (link to the flash entries that have caused problems, please). That way, we can report back to Adobe with your findings.