After installing beta3, I noticed a strange problem, namely, the opening of the project and working on several panoramas in turn (change of name, geo tags, change the view startup, changing the settings of the compass), and several times during the writing of the project follows the next write just like to reboot windows with preview panorama preview is not already showing. Nothing is able to restore the panorama preview, in about preview options are not available, and the CPU load suddenly increases to 99% and did not decrease, it helps to just turn off the program and then on again. Shut the program down after the closing manager in windows. I've had this problem several times while working on the same project consisting of 316 panoramas. I include a screenshot.