Apparently if you switch the extension back from ".m4r" to ".m4a" the trick works again. Don't ask me why... More info here: http://joemaller.com/2007/09/08/make-custom-iphone-ringtones-work-with-itunes-741/
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Apparently if you switch the extension back from ".m4r" to ".m4a" the trick works again. Don't ask me why... More info here: http://joemaller.com/2007/09/08/make-custom-iphone-ringtones-work-with-itunes-741/