iTunes music not playing after iOS 7gm install

[fotomatt1]

I put iOS 7GM on my iPhone 4S with relatively few issues...a few apps don't run that were already documented, but when I was on the subway this morning and went to play music, the player began scrolling from 1 song to the next without playing anything, and it started putting an exclamation point with a circle around it to the left of the song as if it were a song that wasn't found. The music is indeed on the phone. Any clues?

 

[Gus Van Der Mee]

I'm experiencing all kinds of issues with music too. I purchase song on my Mac and the song appears on my iPhone, but i can't play it. It just shows a cloud with an arrow on the right, but clicking it does nothing. If i reboot i get doubles in my library of all songs. If i try to redownload songs from iTunes store app nothing happens.