On Wed, 27 Sep 2017, Rich Shepard wrote:
It's not that simple. I commented out the second line (above) in the preamble and the screen display as well as the preview has drastically changed. Lines are displayed on top of each other and the signature environment is not behaving as before.
I think I know why these issues have appeared this week when all previous letters (and documents using the other KOMA-Script classes) worked as expected: over the weekend I upgraded TeXLive from 2015 to 2017. There are likely changes in there that are incompatible with the settings I used to use. Possible? Rich