Thanks for sharing your experience with this beta version.
Can you please give me more details on how you are processing your panorama. Do you use the Gigapan import plugin ? If so, what are the options you checked in the import settings ? By the way, if you can upload your panorama on our ftp server, it might helps us in finding the root cause of the issue (http://www.kolor.com/forum/t766-ftp-server).