problem with MPMoviePlayerController

[ruchir.vasavada]

I am using MPMoviePlayerController in my app to play network videos. Sometimes while the video takes time to download, the audio keeps playing and after some time video starts but in a fast forward manner, as if to make up for the lapsed audio. This generally happens more when using cellular data network. Everything else is fine and as per the expectations.

Is there any setting which I am missing or is it a known issue in the player?

I am using iOS 4.3 for compilation.