Vegas has been plagued by a bug for years and years that will make it crash if you delete a video event on the timeline by pressing delete while the video is playing. With V14, they fixed this for the most part, however it still shows itself from time to time. A few minutes ago I was able to crash it by cutting a video event off of the timeline while it was playing (cutting to the clipboard by pressing ctrl+x). I crashed it again the other night by just deleting a clip while it was playing. I tend to make a lot of edits while the timeline is still playing, moving stuff around and deleting clips as I go, and was really hoping that Vegas could start keeping up without crashing so much! I'm glad the issue was at least partially addressed, but I hope they continue to stomp that bug.