The problem with planes being misoriented, i.e. sliding around on their roof has been fixed. I have sent a new build to the beta testers and if no other issues crop up, 3.1 can be released publically.
While the release of SB 3.1 to beta testers has mostly gone well there is one exception. Some aircraft are appearing sideways and upside down. While this makes for some pretty amusing screen shots, I'm not going to release it until I figure out what the heck is going on with this new issue.