On occasion, when I wake up my laptop from sleep and Minecraft isn't responsive, it will close by itself. THIS IS NOT A CRASH REPORT! Although that's annoying by itself, rarely, when I restart Minecraft, I will lose the world I was in when Minecraft quit. I've lost entire survival and creative worlds I've spent 100+ hours in. However, the worlds are still in the worlds folder, meaning Minecraft has never refreshed the worlds list, ever, in the three months I've had the game installed. EDIT: I just reset Minecraft from Windows Settings, then started Minecraft, then closed Minecraft, then copied all the worlds from my documents folder, then started Minecraft. All my worlds are still missing. EDIT 2: I just reinstalled Minecraft, and then followed the exact same steps as above. Still missing. At this point, I may uninstall Minecraft if I can't recover my worlds. Again, they're in the MCWorlds folder. Every single one. I highly recommend adding a Refresh World List button when the world list is empty. EDIT 3: C'mon guys, we're paying customers. Don't treat us like this. Still waiting... EDIT 4: Okay, now I'm slightly annoyed.

IMPOSSIBLE TO REPRODUCE EASILY. It happens randomly after it quits by itself.

Affects Versions:

1.4.3 through 1.8.0