I'm from UK and using Amazon Fire TV from USA. On every xvmc build video is stuttering not like skipping frame but every 2-3sec there is video jitter. I thought that there is problems with conversation from NTSC to PAL refresh rate but if I watch Amazon Prime video or Netflix video is smooth. I was trying to change all settings+different sources+different video files then experimenting with XBMC playback settings but without luck. Video is not smooth. Anyone having any similar problems? Any suggestions? Or this is refresh rate fault. Thank you for your help!