24.0.0.186 causes flash time outs

Win 7 64bit

Firefox 64bit latest build

Was using v23.0.0.207, yesterday updated to v24.0.0.186 and after that websites with flash I would get a popup saying flash has timed out and in some instances freezing the browser and I have to kill the process in task manager.

I uninstalled v24, downloaded v27 and reinstalled and everything works fine.  So whats wrong with this latest version?