The past few times that I have ingested off of a 4GB SD card, PM has ingested about the first 1/2 of the images, then generated error messages on the balance, saying it could not copy them. However, if I look at or copy the files to a folder using Windows Explorer, I have no problem.
This is the first time that I have used these SD cards with more than about 1.7GB of data (all NEF and JPGs).
I'll reformat the cards and try again after my next shoot.
Mick