macos - Numpad's Enter key is acting like the Command key instead

I can't get the numpad Enter key to work on OS X 10.6.5. The numpad works fine, as do the plus and minus keys. Only the Enter is not working.

I tried 2 keyboards and I get the same problem with both, so it's got to be a setting somewhere. In Keyboard Viewer, when I press the key, it shows that the ⌘ keys are pressed. And indeed, pressing Enter-L puts the cursor in the location bar of my browser, just like Command-L would. Is there a way to remap it?

Answer

Since my comment fixed your issue, I'm posting it as an answer:

You had DoubleCommand installed.

Other possibilities would have been KeyRemap4Macbook or possibly any Input Manager.