I've been using Lightroom mobile for iPad for some days now without problems.
Yesterday I added two new Collections in Lightroom and enabled syncing. After syncing I wanted to see the pics in Lightroom Mobile, but only some of the pics of one collection were visible. Nevertheless the collection itself is visible and also shows the correct count of pictures. When I tap on the collection, there's just a black screen.
The second collection was completely empty. I disabled syncing of the collections and created a new one. Now I can't see any pictures. I also downloaded the pics for offline editing...no error messages, download worked, but still no pictures shown.
I also opnened the Photoshop Mix app and tadaaa.... I can see and access all pivtures from the Lightroom tab. Then I installed the iphone app and it's the same problem there - collections with correct pic-count, but no pics in it. There's enough space on both devices and I also emptied the cache.
The desktop app in Firefox is working fine.
I'm using recent versions on a Windows 7 PC, iphone 4, ipad 3
Thanks for your help