I've had lots of problems with iOS 5 that I can't believe are occurring on my obviously brand new 4S (settings app crashing, iPhoto on my Mac not recognizing my iPhone, iClould not properly working, Siri not connecting to network, Siri not understanding 75% of the things I say, Apple screwing me out of AppleCare+ and not caring because I pre-ordered through Verizon who didn't offer it, etc)...but the problems I've had with the music app have by far disappointed me the most.
1. I got the 64gb 4S over the smaller models for one reason only - so I could finally put all of my music on an iPhone. I cannot even find the songs I have put on my phone through the music app. They are all jumbled up and are completely out of alphabetical order. Before coming on here, I literally just spent about 15 minutes trying to find a song and could not find it (at least where it should have been in alphabetical order) in the music app. I had to go into Spotlight and search for the song.
Examples:
No P's under P, but plenty of R's and N's
B's mixed in with C's under C
R's under S
2. I have a car radio with a USB connector made specifically for Apple products (and made in 2011). 4S plays through my radio fine, but shuffle randomly and automatically turns itself off after playing a few songs. I never had that problem with my 2nd gen iPod Touch, which I unfortunately sold when I got the 4S. Since my 4S gets stuck on the 'connected to dock' screen (even though a radio is definitely not a dock - shouldn't it be 'connected to accessory' screen?) when plugged into my radio (another problem that never occurred on my Touch), I have to then wait for a red light or stop sign with no one behind me, unplug it, turn shuffle back on, and then plug it back in.
3. Music app has crashed a bunch of times.
4. Music app very slow opening up and switching between playlists.
5 (Not necessarily a music app problem, but it's an issue with iTunes syncing I guess, so I'm including it). All the ringtones I have on my 4S, I also had on my iPhone 4, which I also unfortunately sold when I got the 4S. The ringtones work fine, but only when they decide to stay on my phone. I have no idea why, but they keep vanishing from my phone and I have to keep re-syncing them back on. How do I know this? I was with someone else who heard a phone ringing and asked if it was mine. I told the person it wasn't my phone because that wasn't my ringer. They insisted the ringing was coming from me, so I pulled my phone out of my pocket to prove to them that it wasn't my phone...only it was my phone. All my custom ringers were gone and my iPhone just selected a new standard ringtone for me. This has happened now three times since I got my phone.