When I double click a layer's name I can edit the layer name. I can copy the layer name, and past it back into the same field. When I press enter, and try to edit the name again it doesn't do anything. I cannot paste it at other layer's names either. The clipboard is loaded with the text, as I can paste it into other applications.
I remember this being possible some time ago. I have no idea if there's anything that I've changed.
I am able to reproduce this in CS5 and CS6. The culprit seems to be specifically the Edit>Paste menu item. Hiding the other two (Edit>Copy or Select>All) doesn't trigger the problem.
Also, I'm seeing that if I copy a layer name and then click to activate another layer name right away, pasting always works. If I press Enter/Return or Tab after copying the layer name and then activate another layer name, the problem occurs.
I'll go ahead and log a bug for this, but in the meantime, I would sugge...