The recent update (must have been 2.28 -> 2.30) brought a very different
gnome icon theme. Many parts are refreshed and it's nice of course.

Many icons have now regressed in icon size, meaning that they now look
ugly where previously used in large sizes (debian package kupfer, 96x96
pixels)

Icons that only have 48px icons now iclude:

application-exit
system-run
preferences-desktop and / or gtk-preferences
list-add / list-remove
system-shutdown

There seems to be no SVG icons installed, and the 256 px category is
as we can understand missing some icons that were previously avaiable at
these sizes.