I noticed that most of the time I cannot copy a Hue/Saturation adjustment layer in Photoshop CS6. (In about a third of all cases it works, in all others I have to create a new Hue/Saturation adjustment layer).
Hitting Command + J will cause my Mac to make an error sound.
Option + delete also doesn't work half the time.
Also: I cannot do a "Stamp visible" above a Hue/Saturation adjustment layer. Hitting Command + Option + Shift + E will bring another error sound.
I have to creat a new layer, and then create a stamp visible. But half the time this doesn't work, either. Hitting Command + Shift + N will give me another error sound.
I have to create a different adjustment layer, then an empty layer, and only then I can create a "stamp visible".
Only Hue/Saturation adjustment layers are affected by this - but it's a true hold-up.
What Mac? What version of OSX? That aside, your issue sounds too exotic to be a genuine bug. Sounds more like some specific combination of settings is preventing this. could be anything from blending tricks to color profiles...
Mac OS X Mountain Lion 16Gb RAM on a MacBook Pro retina.
I have more problems with Bridge, and maybe I should uninstall-reinstall