I have stutter in 23.976 playback with J River 29 + nvidia rtx 3080. This issue is present with J River 28 too, but is fixed when I enable V-SYNC from the Nvidia control panel. This is not working in JRiver 29, every time that I play a video the Nvidia Control Panel change my custom v-sync setting for the JRiver 29 app to "use the 3D setting". It doesn't matter if I change it to "use the global setting" or VSync enabled, is reverted every time. Anyone have this problem?