Sometimes the sound for video or downloaded music or any other sounds; streaming, etc do not work(except for when the phone rings and notification sounds). Sometimes it happens after listening to downloaded audio and video. The only fix I have found is rebooting. It happens randomly but it happens every time i play video while in the blur camera.
I just switched to the aosp camera and it hasn't killed the audio yet. I'm also using the music mod because it seems like the google music caused the sound to stop working a lot, even after using the one from the market.