I'm having trouble understanding this for the following reason.
It took me 6 months to build and repeatedly test all of the GV spawns I put on my terrain that I submitted recently to Hitech. I purposely tested all of the GV spawns on the terrain for problems three different times. During all of that testing the random spawn circle dropped my panther into the center of tree clusters locking it in place. Then the un-sticking routine would kick in and the trees would eventually spit me out. I would run into and get stuck on branches that if I could not un-stick myself, the un-sticking routine would kick in and move me out of the hang up. It even burped me out of a house I half spawned into.
How exactly are you gents getting permanently stuck when I spent 6 months trying to do that to Hitech's un-sticking code looking for any bugs? Granted there were situations getting un-stuck from one set of trees stuck me in another but, the un-stiking routine still kicked in.
As for your rounds and the tiny branches, it's on Hitech how\why he decided to set the collision mesh area.