Thanks Jesse, the files you sent contained enough information for me to find what I was after.
One of the things that puzzled me about this was the input method you are using. I suppose there is no wrong way to input some of these items into the score, but I believe that what you're inputting with Expression Text is usually input with Technique Text (or possibly some other method). I think this is why I have not heard of anyone else saying there was a font problem.
The Staff Lines that were displaying wonkily have a default text assignment of Expression Text and the similar lines (rit. vs rit., etc) have a default text assignment of Tempo Text (which I see is set to Plantin MT Std). I'm assuming here again that other people are using the Staff Line versions that have the Tempo Text as default.
Now, with that said, I see two options for remedying this:
1) Change the input method for the various elements that are effected by the Expression Text setting.
2) Or, probably the easiest way for you to get all the fonts back to the way you want them is to change the Expression Text font to Plantin MT Std. And once you do this in your "master" template file, you won't have to do it every time after that.
If I need to release an update to the VDL Template for some reason, I'll be sure to update the Readme file to account for this optional font setting.
Hope this gets it for you.
Hugh