I just uploaded an update to the Caleal2 UI to fix the incompatability errors caused by the changes to the pet window.
I got rid of my custom pet window and am using the target window xml file for the stats and player info in my UI since I use the player window for the normal functions of the target window.
The 3d targeting seems to be working fine in game with my UI.
You can download the updated version in the Complete Sets section of the download area as soon as a moderator passes it through. Its listed under "Fantasy"