Hey, this happened to my fiancee just last night. I searched the boards, and this is the only other occurrence I found, but if it happened to anyone else, I would like to know if it has been determined exactly what causes it. Is it from not paying the rent? She didn't think she was late, and the house wasn't locked up, and all the items she left on the floor were still there. It was just the chest that was missing, with over 60 items inside (I'm not sure if the chest was totally gone or just empty). I don't think there were any game-necessary items in there, but if there were I saw the link to the inventory recovery post so at least she can get those back. I think she lost 50000 gold too, I'm not sure why she kept it in the chest.
Anyway...if anyone has any information I would appreciate it, or you can just commiserate with me instead.
Game on,