Each time I try to adjust the master volume, my mouse becomes stuck on the slider. When I try to zoom in on my video track, it only affects the slider.
I have found if I minimize vegas and bring it back up, I can then again use my mouse in the timeline.
Am experiencing exact the same thing !!!! ( vegas 13 build 373 - win7x64 ultimate and pro ).
Also when increasing dB of one volume track and previewing ( hearing ) , it is ok , but after rendering same , it is as if it was not increased .
Am therefore still working in vegas 12 , bought the vegas pro 13 upgrade when it was released long time ago but have not used it yet in productions , what a shame ,