Jan Vroonhof writes:
[...]
The most suspect changelog entry seems to
be
1998-03-27 Kyle Jones <kyle_jones(a)wonderworks.com>
* faces.el: Separated face intializations based on
device classes into device type specific (tag set,
instantiator) pairs.
Kyle, what did you do there?
I didn't mess with the Custom stuff.
Initializations that used the 'win tag were changed to use
specific device types like 'mswindows and 'x instead of just
'win. This was done so that we did not have to initialize
faces using only those colors and bitmaps common to all window
systems (MS Windows and X Windows at the time).