Same issue here, although sometimes it works, I have to tap it several times before it actually responds. When I open CS5 or CS5.5 it works at the first time.
Adobe, you really dropped the ball with CS6, it’s FLOODED with bugs all over the place, from not being able to copy from one comp/application to another, to the multiprocess render being completely disabled, this issue with the mini flowchart is just the cherry on the cake, since I upgraded to CS6 I spend more time finding workarounds to all your bugs than working.
Fix it NOW, it’s very frustrating to pay lot of money and receive a substandard product in return.
I reported several other bugs to your bug report form and so far NOTHING has been fixed, so what’s the point?