I am seeing the same problem. I tested with Wings3d 1.5.2 and a window opens up stating that there is a hotkey problem. It gives you the option to ignore, which cancels the command, or delete the hotkey. There is more info in the dialog but more than I want to type here...
I have never used the hotkey to access merge so I never knew about this...
oort
I have never used the hotkey to access merge so I never knew about this...
oort