Thanks Bob
Yeah that would work although a) I've already got a sequence with the clips cut in, which I'll have to replace, and b) the Pluraleyes sequence with all the clips it's attempted to sync for better or worse is 16 hours long. So replacing at the source would be a /bit/ of a timesuck.
thanks though! Someone at RedGiant is looking at my sequence; he said they couldn't recreate the problem with the new 6.0.2 so we shall see... more soon