In reply to screeweasel:
If you can try it from a PC
play a clip and click ctrl, alt, shift, D.
this will launch netflix diagnostics and tell you if something is wrong. Post back what you get and we can suggest how you fix it.
MovieId: 70221974
TrackingId: 13589554
Xid: 14509192638888 (14509192638888)
Position: 156.462
Duration: 2860.031
Volume: 100%
Player state: Normal
Buffering state: Normal, ETA:0.000
Rendering state: Playing
Playing bitrate (a/v): 96 / 3000 ( res: 1280x720, par: 1x1 )
Buffering bitrate (a/v): 96 / 3000
Buffer size in Bytes (a/v): 2775565 / 82712569
Buffer size in Bytes: 91219165
Buffer size in Seconds (a/v): 227.580 / 223.538
Will Rebuffer: false
Current CDN: c002.sou001.virginmedia.isp.nflxvideo.net, Id: 22964
Audio Track: en, Id: 656e7c322e307c5072696d6172797c747275657c6e6f6e657c756e6b6e6f776e7c756e6b6e6f776e7c417564696f7c756e6b6e6f776e7c7c, Channels: 2.0, Codec: mp4a
Video Track: Codec: encv
Timed Text Track: en, Profile: dfxp-ls-sdh, Id: 6e6f6e657c554e4b4e4f574e7c756e6b6e6f776e7c66616c73657c656e7c436c6f73656443617074696f6e737c756e6b6e6f776e7c546578747c7072696d6172797c7c
Framerate: 25.000
Current Dropped Frames: 0
Total Frames: 1856
Total Dropped Frames: 4
Total Corrupted Frames: undefined
Total Frame Delay: undefined
Main Thread stall/sec: DISABLED
VideoDiag: readyState=4,currentTime=156.786803,videoBuffered=12.000,videoRanges=152-164,audioBuffered=48.000,audioRanges=128.042666-176.042666
Latency: 0 ms
Throughput: 27750 KBPS
Bandwidth (normalized): 27750 KBPS
Max Sustainable Video Bitrate: 27654 KBPS
DFR: {"480":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"720":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]}