[MC-55772] Changing Minecraft versions causes inventory cleared/deleted

1. Open world in 14w21b and get something in you hotbar/inventory
2. Close Minecraft and open 1.7.5
3. Open the world

Your inventory is deleted

Linked issues

140th duplicate of MC-45009. Congrats.

marcono1234 2014-05-24T14:51:29Z

Thank you ...
I am sorry for beeing so stupid, the reason for it is also so simlpe...
Minecraft doesn't accept numeric IDs anymore...