I'm on Vegas 23 build 356. Every time I skip a frame or perform any action, another "p" is added below the preview shown in the screenshot above, where it should be displaying stats like frame rate instead. Skipping to a different frame adds exactly 3 extra "p" every time. Eventually it exceeds the bounding box for the text there and vanishes.
In Project Preferences, the "Pixel aspect ratio" and "Frame rate" fields are pulling the bottom string from the Template drop-down menu (HDV 1080-24p 1440x1080), and those templates no longer display their frame rates but in some places display Chinese characters instead:
Text corruption exists in other places throughout Vegas. Eventually the program crashes because of it. Uninstalling Voukoder Pro fixes the issue. I have tried reinstalling both it and Vegas as well as removing all cached files and settings, didn't work.