Lip sync on pre-recorded DVDs with Philips DVDR75

[jonperry64]

I have read the 30 or so (mostly) glowing posts about the Philips DVDR75 and recently bought one myself (Richer Sounds, UK). On the whole I am pleased with it. However, I have noticed that even on rented DVDs the synchronisation between sound and vision is slightly out. Apparently this is known as 'lip sync'. I think the problem gets worse as the film progresses, but I may be imagining that. Has anyone else experienced this problem? Any suggestions as to whether it can be rectified? If I were to reload the firmware in an attempt to solve it, would my machine still be multiregion? (I bought it as a multiregion machine).
Any ideas gratefully received - As you will have gathered, I know very little about these things.
Many thanks
Jon

[daveeb]

I think a firmware update is what you need. they have it on the panasonic site.

[hech54]

Do you have a DVD "Player" you can check it against?