I'd like to report a bug. I have encountered it in v3 and now v4 and do not now the cause or the solution. (I never tried v1 or v2)
When trying to play music with the stock music player, no music is available or found on the SD card or playable. When pressing play, it opens the player, tries to start playing (black music screen) and responds with the message (in Dutch): "Muziek is gestopt" which would translates into "Music stopped or music has stopped or music stopped playing". The message can only be removed by pressing 'ok'. The player then closes and after a few seconds the same message pops up again. But no music.
It is possible to play music (for example through the filemanager) so the hardware is in order as far as I know.
In v3 I removed some services so I thought that was the cause. But in v4 the same thing happens and this time i did not thinker with anything (stock install with stock apps). Now the strange thing is: This 'bug' starts only after a few reboots. The first few times the music on the SD card is indexed correctly and plays fine with the stock player. But then suddely the stock player stops playing without a reason. In v3 I 'solved' it by trying a few non stock players. In Poweramp I could select the music dir manually so it played my music. But I would like to use the stock player so maybe you have a solution or tips for things I should check. Al the media indexer services are running fine.
Other than this bug I totally love v4!!! it's rock stable, very battery friendly and fast. so thumbs up for your hard work!