NTSC project gives jittery audio and wierd edits

Its important that I fix this problem because I've been promised a nice meal for editing my friends little boys 1st birthday party!

My project is NTSC 4:3 DV
My source video is 640x 480 pixels at 30fps h264.
The audio is on a seperate track (standard wav file).
The rendered DVD has really awful jittery audio.
Also the edits I have made to the video are not rendered correctly - i.e. some of the edits start in different places or they finish early and I am left with a blank screen in between clips.

Any ideas?

Forums:

I've gone back to using Premiere- I think Kdenlive is great but its just not quite there yet.
I can't wait for it to realise its potential and I think the development work on it is fantastic.