Thanks for the instructions on video insert.

For some dumb reason I still use YouTube, even though this is how Google recommends my videos:

(This is from my current video 'The Worst Part of Censorship is...')

76% of original size (was 660x19) - Click to enlarge




Creator of the free website:
PixelDatabase.Net
A Free Online Text Based Image Editor
76% of original size (was 660x19) - Click to enlarge

Thanks Sonic 7, I ran several tests yesterday and discovered there was absolutely no difference in lip sync between the same scene rendered at 24, 30 or 60 fps, the mouth movement was identical. I also took a screen grab of a scene in Realtime and compared it to the final render and discovered that there were small variations in mouth movement and facial expression, but not sufficient to explain my sync problem. 
All the testing I did was with a single talking character with no scenery or props, I am also aware however that this problem is showing up in large scenes, with multiple characters talking and it may be that I am stressing out my PC (though unlikely).
The fact that the lip sync problems occur in the iclone render means it can't be the NLE as that only comes into play when I am correcting the problems. It seems to me that the problem is either in iclone, my PC's capability to process or operator error. I'll monitor this more closely on my next project, but typically I'm finding the lip movement is lagging behind the audio and so I have to drag sections of the audio forward, but the amount varies throughout the scene, so its not just a case of dragging the whole audio track forward.
 Once again, sorry this has wandered from the core topic of this thread, I'll make a new post when I have more info. Thanks for your comments.
Cheers,
Tony
    

How long are scenes tony?
I ask this because the longer they are, the drift in the audio will go from acceptable (hard to notice) to nightmare levels.  

The reason for this is that when you are placing audio in iclone you are working at 60 fps and your output will be in a diferent frame rate making the audio out of sync (the starting position of an audio file is determined by your frame rate). But luckily the drift is not going to be noticeable if the scenes are short since drifting audio is noticeable after some time, so if you make your scenes short the drift in audio will be minimal. And like i always say: audio in iclone is for reference only.

If you still have issues let us know.

Thanks Raxel_67  I've sensed this might be the case. The scenes vary, but normally I try to do everything in 30 secs blocks, however I have done much longer on occasions. As I'm doing the next project I'm going to closely monitor what's going on with the sound to try and work out specific examples.
Thanks for the advice.
Cheers,
Tony

Mmmmhh *scratches head* that is weird, at this point i think i would need to see both the project and a render done in your computer to pinpoint the issue.