Sound in Flash Player Broken?

Anyone know when or which update broke how event sounds play in Flash? I have some old stuff that used to work just fine, and now the sounds don't play correctly or not at all. I figure it had to be in one of the recent Adobe 10.x Flash player updates. This bug has to affect a lot of pages that have UIs or games made in older versions of the Flash authoring tool.

Surely I can't be the only person to notice this.