Not sure if this is the place to report bugs, but I’ve just discovered that if the live viewer is set to “stay on top” and you Click Help | About, the about screen is shown modally behind the viewer screen and then you can’t click the Close button to continue. Only a problem if the live viewer is covering the center of the screen, but it just caught me out 🙂
Thanks for the report. It will get fixed in CS6. I actually thought that was related to z-order problems that Delphi addressed a few versions back. Clearly something else is going on.