I had everything working, now not sure what has gone wrong or if simply a bug. The 'WORKS' page on my site had 3 galleries showing captions in lightboxes. I was playing around with something and now the lightboxes of the top two galleries doesn't display the captions even though they are there in the editor. I can also see when comparing with the last gallery that is working fine, that the caption is not being parsed into the mfp title div.
Please help! Will open your access.