Just went to add a control point to a pano w/ 800 images or so. Hangs and doesn't come back. No crash report, I just have to kill the project after waiting a few hours. This was happening w/ Beta 2 (on a 6000 image project) I had this happen a half dozen times. The full release has been able to handle the projects.
Thanks for reporting this issue. Application may hang sometimes when working with many images. Some improvements can be done on that. I am reproducing that on a 4000 images panorama, and we will fix it shortly.