
I have a drawing (Site layout.dwg) with a viewport, title block, etc., and last time I printed, it was fine. Now when I open Print Preview in Paper Space (only) the lineweights are off the scale:

They're fine in model space Print Preview and of course they're normal in Paper Space edit, etc. I made another test drawing (vptest.dwg) with just a few odd pieces of geometry similarly sized in dimension, paper, etc. and it's not exhibiting this behavior. I've not been able to find any difference between the two in terms of configuration or settings, and like I mentioned, it was fine the last time it was opened. It does the same thing when exported to PDF, which makes sense, but... ?
In actual terms, the printed size is roughly 1/25 of the real size and I thought that maybe I should be using a scaling factor, but both drawings are 1:1 in Print Preview and the other drawing is OK.
Any ideas? Will I be embarrassed when Husky points out some simple setting I overlooked (probably!).

Both drawings are attached.
Thanks.