Do you have any small sample which has this issue? I would like to check it - to me it looks like there is something wrong with the seeking itself.
This is a limitation with playback of vdr recordings that has been there for a long time. They play fine but pause/play always takes you back to the beginning of the file and as has been relayed here in this thread ffwd/rew does not work.
There are some 'smallish' vdr files on our .34 Core but they may still be too big...ping me tomorrow and I will record say a 30 sec segment for you and you can grab a copy for testing ;-)