Created attachment 94366 [details]
Simple example that shows the problem.
I defined double-line borders in my page format for a title page, and they display correctly on the screen but don't print or export to PDF correctly. This is a NEW problem. The affected documents printed and exported just fine in previous versions of LibreOffice.
Created attachment 94367 [details]
Exported PDF from my simple example
worked in 126.96.36.199, regression in 188.8.131.52
*** Bug 75607 has been marked as a duplicate of this bug. ***
*** Bug 75700 has been marked as a duplicate of this bug. ***
*** Bug 75770 has been marked as a duplicate of this bug. ***
An identical problem occurs in Calc when a cell or group of cells are formatted with a double line border. The borders also do not print or export to PDF correctly (Gap too wide)
Hopefully this commit
which is originally for Bug 75260, will fix this one for 4.2.
The corresponding commit on the master branch is this