I've finally just got round to installing the lastest mplayer (7/1/2007) which says it cured an audio sync problem.
Here when playing flv (youtube) videos the video lags behind the audio, however swapping back to the experimental #3 version puts the sync back. Is the new version slower ?
Here when playing flv (youtube) videos the video lags behind the audio
If the delay is constant you could adjust it via keyborad controls (+ and - adjust audio delay by +/- 0.1 second) or via cmdline (-delay seconds) arguments (quick and not that dirty workaround if you need the extra features the latest verision has).
Jack
"the expression, 'atonal music,' is most unfortunate--it is on a par with calling flying 'the art of not falling,' or swimming 'the art of not drowning.'. A. Schoenberg