While playing with the latest snapshot I accidently closed out of my world. When I logged back in every item in my inventory and all my chests disappeared.
MC-45357
Inventory Items Disappeared
Resolved
Duplicate
0
Michael Fagan
(Unassigned)
Unconfirmed
Minecraft 14w03b
Retrieved
When you logged back in, did you switch to a previous version? if so, duplicate of MC-45009