Adhoc 'flicker' on DVD

Hi.

I have recently finished a project using Final Cut Pro. After delivering it to the client I received a call with a query that I'm not sure how to respond to.

They watched the DVD in full (30 mins) 3 or 4 times - checking for any changes they might want made. Everything was fine. They then watched it a further time and noticed that two scenes 'flickered'. When they played it again the next day, the 'flicker' was no longer there. I am at a loss to explain why this is happening and would ideally like to resolve the problem. Can you anyone offer a solution? The 'flickering' occurs at the end of one scene with a 'fade out' and the start of another with a 'fade in'.

Many thanks.

I would suggest trying on a different DVD desktop player.

--ken