Object X is not a valid physical world object

See this all the time when I log in and have seen it when changing zones.

Object X is not a valid physical world object

yep, we have had this from time to time and it goes away with a wipe.
someone is probably creating zombie-objects with illegal parameters.
if swimming it can even crash your client.
hope they will be able to fix this. :)

These are accidentally created 'bad objects' placed by Guides or Developers.

It's not a major issue and we will implement some error checking to prevent this is the future.