Use your editor to chop out one of the offending sections, say five seconds long to keep the file small, then upload it to a place like youtube or putfile etc if you can.

If that's no good I'll send you a private message with my email address and send it over, if I can't suss it easily I'll make it viewable for others to help.

Of course this assumes it's the rendering, not the writing to DVD that's the problem, if the renders are ok, then we need to look at the DVD authoring side.