Servers: seems that the server needs periodical restarts; approx every 2 - 4 hours. (Constituting a Re-log of the game and solving the moving of large furniture/objects in the game).
There seems to be a problem when moving large objects, and the server refusing those items to be moved.
Experienced it in my solo world yesterday as well. Did a relog and didn't have that problem any more. Seems that it happens mostly round the 4 hour mark in Solo and 2 hour mark on a server.
Possibly a Memory Leak?
There is also an issue when you have placed beer bottles in the world, re-log/load in a different day and you can't pick the bottles back up, because your crosshair doesn't see it, even though you can? (Both Single and Multiplayer).