Enter takes input as fn + enter.
Answered
So after a restore from time machine I get the odd case that using enter in choose selection (after alt+enter f.e) will do nothing. I need to press fn + enter on the keyboard for it to take.
Mapping it to enter will give ´ as input but will not work in the editor.
I use the 10.5+ mapping for mac.
Example of the two mappings after I add enter myself.

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So, seem to be PEBKAC, had to use Norwegian Extended keyboard and not Norwegian keyboard for it to work. Do not know why but might help someone else.