To Malag: That was indeed Atlantic as I recall.
To original poster: Hopefully Mesanna will see this thread and run over and turn the spawn off. (EDIT: UO team, please develop some ways to fix stuff other than having her run over and fix it manually. Sooner or later she'll get burnt out.)
If she doesn't, might want to try killing them and seeing if there's a re-spawn? Or have you done that already?
If nothing else this, together with the Vanguard spawn thing, proves that screw-ups aren't limited to the smaller shards.
Second edit: Since we've had the Publish I'm guessing they must have already had the event.
-Galen's player