I just updated to 8.8.3 and am having a very strange problem with full screen playback. When paused on a frame the aspect ratio is correct. When I play, though, it is distorted/stretched. I've tried playing with all the settings in "full screen playback" but it all looks weird. Plays fine in the record monitor. I am using a large ultra wide LG monitor.
Running 8.8.3 on OS 10.11.4
originally 4k material but transcoded to DNxHD 36 1920x1080