Ok, so I get on my minecraft world after I get home from school, and all of the items and blocks are missing from my chests! HELP!I also installed Sphax Purebdcraft Resource Pack if that helps!
You used one of the new snapshots, it updated all your ids to the new string system, which is not compatible with older releases.
Don't use snapshots on world's you care about.
You were warned:
Are you sure you want to enable development builds?
They are not guaranteed to be stable and may corrupt your world.
You are advised to run this in a separate directory or run regular backups.
Are you sure you want to continue?
Don't use snapshots on world's you care about.
You were warned:
I didn't use a snapshot I played the entire world in 1.7.4.