We upgraded from 4.5.9 NE to 5.0.2 last night. Looks like something in the upgrade has caused our documents to disappear. Changing skins doesn't help....though our theme developer here did change some global files outside of the skin folder....so I have to track that down. I didn't know if anyone else had seen this though?
If I hover the mouse over the "notebook" folder, it tells me how many documents are inside it and how much space they are using. I cannot see them in the document pane though, just a big blank frame. So they are in there....just can't see them or do anything with them.