Being able to shift subtitles below the video (having it in the letterbox-part of the movie)
I hope you haven't been wanting this the past 6 years.
16.0.154 (8/17/2011)
9. NEW: Subtitle shift and size can be set per file, and settings will be saved between plays and runs.
How to do this is explained in the
wiki.
"Supports sizing and shifting (global size option in Options > Video, per-video settings available by right-clicking a playing video and using the 'Subtitle' menu)"