This SEEMS isolated to Magnum and Ferrari servers (as far as I can tell) ... The issue is NOT occurring on Second Life Server regions.
I have a lazy floating tube tour that I have created for numerous clients, as well as having it on my own parcel. On Wednesday morning when my region was restarted, all of a sudden the tour guide rezzer (which rezzes a new version of itself AFTER someone sits on a tube and it floats a certain distance away) has begun spewing out versions of itself every 15 seconds ... ON ITS OWN! Everything was fine BEFORE the latest LL region restarts! WHAT IS GOING ON?!?!