User Interface Problem
For some reason when I boot doomsday. The title screen is all white and the menu text shows up blotchy making it impossible to read. Even the HUD is all white including the weapon sprites. This started when I downloaded any of the build type versions. Doomsday runs fine regardless of the very annoying problem.
Comments
Regardless, make a backup of your config files and then delete the originals allowing the engine to recreate them when you next start up. See if this resolves your problem.
Dday compresses textures by default, but with some video cards, it leads to graphical glitches.
I believe this problem has started occurring somewhere between Beta 6.9 and the stable 1.9.7.