I just went to burn some mp3 tunes onto a CD to move to my computer at home. It seems to me that at some time in the past when I tried to burn a CD with iTunes and I had more songs than could fit onto an audio CD iTunes would come up with a box that told me that the songs wouldn’t fit on a single audio CD and asked if I wanted to burn an mp3 CD.
It’s been quite a while since I did this, but this time the dialog asked if I wanted to create multiple audio CDs.
Of course I went and set the preferences setting to burn an mp3 CD and it worked fine, but it seems like an interesting change in default settings.