"0ms" popping up during video
 

Hi,

When I'm watching videos I'm fairly often seeing this "0ms" thing pop up at the bottom of the screen. I'm not seeing any audio sync issues though, so I'm not sure what it is. The videos are HD, but in one case it's animation with relatively low bitrate. I'm connected over 5Ghz 802.11n with a good signal (I'm about 7 ft aware from the AP with clear LoS).

What is that coming from?

Thanks!