Since I upgraded from 12.1 to 12.2 through freebsd-update font artifacts with Xorg have appeared. More precisely, characters are randomly missing in for example Conky, when loading web pages with NetSurf, WindowMaker menus or the i3 bar. I have booted a Haiku live CD to check whether this problem was reproducible with it so as to rule out a malfunctioning video card. There are no font problems with Haiku or any other display problems.
This machine is an AMD Athlon 2800+ with an EPoX EP-8RDA nForce2 motherboard and the video card is a Radeon 9600 PRO.