At a little after 3pm today a database with many residents' inventory on it crashed. It came back up after a few minutes but many of the the sims partially got wedged in the process, which took about half an hour to clear up. In the interim, in-world inventory operations would have been unreliable at best. Things should be working now though.
There have also been some performace problems recently - slow logins, and slow or unreliable inventory transfers. It's not clear yet if these two things have the same cause but we're trying to debug that right now. Sorry for the trouble.