There have been problems after the settlement of the original court case when the newcomer, Apple Computer, agreed to not use the "Apple" name in association with music in any way. The Beatle's "Apple" had the use of the trademarked name "Apple" locked down quite legitimately in association with music.
So far, Apple Computer has signed two agreements promising specific limits on their behavoir in response to two specific court cases.
Now, with Apple Computer distributing their mp3 music player under the "Apple" name, and running their music store, under the "Apple" name, they have stepped over the line and broken the settlement agreements they signed with the other company yet again.
I think Apple Computer stepped on their, uh, USB connector this time ...
Very simply they signed a legal paper to end a court case in which they agreed never to use the "Apple" name in association with any music endevor. They are now pushing two music products. They are using the "Apple" name to do so.