My notes regarding specific vehicles, followed by general comments....

Airco DH.2 biplane

• Bounding box appears to be crooked while the plane is on the ground. In this case, it's a prim surface. Haven't tested on actual ground.
• Controls are much more sluggish than before.

Terra-Kojima Starling ultralight

• Bounding box has strange orientation. The plane is tilted forward while it's on the ground, as if something invisible at the back is holding it up.
• Controls are sluggish.

Nieuport 17

• Bounding box is tilted right.
• Plane appears to roll backwards then snap back repeatedly while it's just sitting on the ground.

Manta flying wing jet

• Can't taxi properly on the ground. It keeps getting hung up and halting.
• Sit animation doesn't stop when you stand up, as it does in release version. That change will break a LOT of content.

Terra Tachyon

• Bounding box is crooked left/right. Won't sit on ground properly.
• Controls are almost non-functional. Sluggish to the point of being useless.

General observations

• Phantom objects are no longer phantom. My autopiloted tour planes (they auto-rez at the west end of the Abbotts runway) are all set to phantom. They now behave as solid.
• All vehicles cause severe time dilation and low sim fps.
• All vehicles have sluggish controls. Unsteerable, underpowered.
• Can't exceed 1024m altitude. Vehicles bounce off this ceiling. Previous limit was 4096m, and the vehicle was returned to lost and found. I prefer the bounce behaviour to auto-return, but 1024m is ridiculously low.
• llSetPos no longer works on attachments. See TerraSport III parachute.
• Physics beacon doesn't work.
• Objects that were previously neutrally buoyant now sink. This relates to the VEHICLE_BUOYANCY parameter in vehicles.