correct and acceptable have different implications...

Yeahbut®, correct keeps changing on us. See my rabid rantings on you here:

http://wordsmith.org/board/showthreaded.pl?Cat=&Board=miscellany&Number=98321

and here:

http://wordsmith.org/board/showthreaded.pl?Cat=&Board=miscellany&Number=98347

There was a time when the correct word was napron. Using it today would brand you as some kind of kook. The correct term is apron.