iPhone 6 iOS 8.1 - Photos blank / preview corrupt after restore from backup

Hello,

I just restored from a recent backup of an iPhone 5s @iOS 8.1 (from today) to a new iPhone 6, also on iOS 8.1.

Everything else is ok, except the photo library. Only those images that have been edited within in iPhone 5s stock photos app over the last few months do not show up in the iPhone 6 library. The total number of images, videos etc shows up as exactly the same on both devices.

In thumbnail view, they're just white boxes. When I click on the white thumbnail, I can see the intended image for less than a second before it turns into a blank white image again. Interestingly, if I try and revert the image to its original version (as clicked by the iPhone 5s, before it was edited in-app), the image becomes viewable again.
I could do this if it were just a few images, but there are far too many of these scattered around in my photo library for this approach to be convenient.

I have tried restoring from the same back up again, no luck. I even deleted the backup from iTunes, made a fresh back up of the iPhone 5s and tried restoring to the iPhone 6 - no luck.

Is there anyway to force rebuild the photo library? Will that help?

Or should I delete all data and settings from the iPhone 6 and start over again ?

Any clues?