Frodo A/V sync issues DTS (video stutter)

So I decided to upgrade to xbmc frodo for shits and giggles. With XBMC 11 everything worked perfectly. I can get everything to work:

• VDPAU
• Adjust refresh rate to match frame rate
• PCM audio
• DTS/ AC3 passthrough
  

except there seems to be an issue with passthrough audio. When playing a movie with DTS audio at first there's no audio and the video experiences huge stutter. My receiver isn't receiving audio input. But after I press Pause and then Play again (after some video catching up) my receiver "clicks" into DTS mode and everything plays flawless.

I'm running Ubuntu 12 on an Nvidia ION based Mac mini connected to my NAD receiver through SPDIF and DVI to HDMI.

Is this a (known) bug or am I missing some feature?