Fixed for the next release; waiting for the long test before it ships.
Shippedstep 8 of 8
Objects another player placed sometimes vibrated or looked blurry on and off, most likely two copies at the same spot. The next release places a friend's building only once the area is loaded in your game, and removes doubled copies a save holds. On two real games a piece waited while the friend was elsewhere, was placed once on return, and scrapped cleanly.
The steps
Queued · On the list, not started.
Looked into · Investigated or designed: the cause or the plan is written down.
Built · Written, with tests, waiting for review.
Reviewed · Passed code review.
Rig-tested · Checked on two real games playing together.
Merged · In the next release's code. Before the release goes out, the whole of it is played for several hours straight on two games, to catch rare crashes and problems that only show up over a long session.
Long playtest · In a test build of the release, being played for several hours straight on two games.