I was getting this in the current snapshot- 14w21b. At first I thought it was an entity problem- I was just dropping things and reclogging, wanting to use MCEDIT. (maybe my old version of MCEDIT triggered it?) Then my blocks wouldn't save progress either, but my inventory would.
After finding people with similar issues on a forum, I deleted everything from ".minecraft" except my saves, stopped using MCEDIT, and I enter & exit the nether right before saving and quitting now. It saves my progress again, but I don't know which, if any, of my actions resolved it. I hope this helps you guys isolate the issue, but I realize I'm being rather vague.
Lyra Heartstrings
I was getting this in the current snapshot- 14w21b. At first I thought it was an entity problem- I was just dropping things and reclogging, wanting to use MCEDIT. (maybe my old version of MCEDIT triggered it?) Then my blocks wouldn't save progress either, but my inventory would.
After finding people with similar issues on a forum, I deleted everything from ".minecraft" except my saves, stopped using MCEDIT, and I enter & exit the nether right before saving and quitting now. It saves my progress again, but I don't know which, if any, of my actions resolved it. I hope this helps you guys isolate the issue, but I realize I'm being rather vague.