I'm a little confused by this question. Did you mean to say that you wanted the composite layer (technically called a "Stamped Layer" to be *above* an empty layer? As far as I know, that's never been the functionality. If you create an empty layer at the top of your layer stack, it will fill with the Stamp of the layers below - not leave an empty layer and create a layer above it. However, you don't need to create an empty layer - Stamping layers like that will create a new layer by itself Also, you mention Cmd, which is a Mac key, and Alt, which is a Windows key. Did you mean "Option", which is the Mac version (also says "Alt" in tiny letters on some keyboards). Maybe just to be clear, which version of your OS, and which version of Photoshop is giving you the problem? If you think your keyboard shortcut changes MAY have been the problem, may I suggest testing it - in the keyboard shortcuts panel, save the settings you worked on (hit the little "hard drive" icon at the top right and give it a name. Then, change the set back to Photoshop Defaults and see if the problem still exists. If Stamping works correctly in Photoshop Defaults, then we can determine that somehow you inadvertently did change something critical to Stamping when you were working in the shortcuts, earlier.
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