Thanks for the quick response Jim.
I obviously tried viewing a whole bunch of photo's before I posted the question, sorry, I didn't include that, but that didn't make any difference. I kicked off the build thumnails in options (thanks for that, I couldn't see for looking), but unfortunately it hasn't made any difference, it just tells me it's complete (in the action window), but with no change.
I'm wondering if it's as a result of importing the MC15 library. I thought of starting from scratch, but I really don't want to lose the cover-art for the audio as it's taken me a while to build them up for 40k tracks.
Any other ideas would be appreciated.
Thanks.