I am currently playing on another server since I have not had the opportunity of ever playing on Nostalrius (noticed its existence too late).
This server has the boat/zeppelin bug fixed for Mac users. It is a delight to know you can safely travel between continents.
I plan on starting playing on the Nost PVE server, but this bug (which seemed to be there during stress test) could be a real let down. Therefor I hope this is fixed before release (or will be fixed shortly after release).
Greetings,
Haylee