Same 1080-59.940p clip in Vegas Pro 15 struggles to preview at around 50 fps (Best/Full), while in VP16, VP14, VP13, MSP13, MSP15, and MSP16 is previews at 59.940! Everything is set the same in each version, but what am I missing? I don't remember having a preview playback issue like this before in VP15, but just noticed it today while tinkering around with another issue. Or, is this one of those, "well stupid this is well known" things!