Those who have tried Adobe's Photoshop CS6 beta or the
recently-released final version may come across a really odd problem -
very unresponsive menus.
These symptoms will only occur when there's an open file, and it seems
to only affect notebooks with switchable graphics (Intel HD Graphics
paired with an AMD or NVIDIA graphics card). Perhaps that's the reason
why there has been so little noise about this problem online.
We think we figured out what was causing this problem, read more at TechARP.