[Unity5] AudioSource PlayOneShot gives "Ran out of virtual channels"

I'm getting an error I've never gotten before, and only occurs in the Unity 5 beta. It involves the AudioSource, which I do have attached to the GameObject. When I try to PlayOneShot an AudioClip, it does play for the first time. Any other PlayOneShots afterwards are not heard.

Once this occurs, Unity 5 will spit out a warning with: Ran out of virtual channels. Sounds will not be played. UnityEngine.AudioSource:PlayOneShow(AudioClip)

Does anyone have any idea what is going on, and how this could be fixed?