I'm running CS 5.5 on Mac (OS 10.7.4). Try as I might, I can't copy and paste between layers.
Create new document
Create new layer (= 2)
With first layer active, create text box and type randomly
Swtich to pointer, select text box, Copy
With second layer active, Paste
Error message onscreen:
<<Cannot paste or place onto locked or hidden layers. Do you want to unlock and show all affected layers in order to paste?>>
If click OK, the source layer (layer 1) becomes active again, and my text box gets pasted in. The destination layer (layer 2) is untouched.
Both layers are visible, neither of them are locked.
Any ideas much appreciated!
It sounds like you need to trash your prefs. See Replace Your Preferences
And it shouldn't throw that message, but also check to be sure that Paste Remembers Layers isn't checked in the Layers panel flyout menu or you'll never get anything to paste from one layer to another.
North America
Europe, Middle East and Africa
Asia Pacific