This problem is well know and will appear also on your standalone (depend on the model).
On the standalone you can't do anything (
) but on you PC all is matter of codecs.
Use Ligos Video codec / Ligos Audio codec
AND Ligos Splitter (it's important to have ALL of them) and it will be ok.
On another hand, ligos splitter has problem when you try to jump directly to a point in the movie : sometimes you need several seconds before the play continues.
As there is no codecs that can display correct time _and_ handle radom access, you must choice between the two problem.
For ligos, use the ACE codec pack there :
www.codec-download.com