Did you import the complete BPAV folder? If not, try that.
Thanks Harm, I tried that but the problem persists.
I aso tried deleting everything other than the video files and starting from scratch but still it's messing up.
Any other ideas?
Try cleaning the media cache and deleting the .CFA (conformed audio) and .PEK (waveform) files. When you reopen your project, these files need to be recreated, so be patient while this automatic process is going on. Maybe that will solve your issue.
BTW, around 90% use a PC and only 10% a MAC, so you definitely are not a rare species over here.
I'm sorry it's taken me so long to respond - I needed to get on with it and I chose a workaround that involved recording the sound in real-time off the clips and matching that by ear/eye (I do this a lot so it's not really too much of a problem!).
However, your answer, Harm, was prefect! I deleted those files and it's now working perfectly. If this happens again I'll know what to do.
Also, in deleting ALL the .pek and .cfa files, I freed up around 27Gb!!
So thank you, you're a genius!