Someone on the Darkstone forum has given a solution for a similar issue. It partly works with Soulbringer, even though the game retains this odd "stylish" blur around letters; it should become more legible anyway.
Download the ATi Tray Tools, launch it, right-clic on the taskbar icon, go to 3D => Additional Options => clic on Alternate Pixel Centers.
When you quit the game, unclic this option, otherwise other applications will get messy texts/textures (including Aero under Vista, which you should disable beforehand [Basic theme]).
There should be something similar for nVidia GPUs, maybe in RivaTuner?
Hope this helps!
Thank you for the reply and interest in the matter.
Sadly it doesn't work for me. I tried every texel alignment in the Soulbringer external config tool but nothing changed. My Nvidia control panel doesn't have an "alternate pixel center" option neither Nvidia Inspector have it. Thank you anyway. Maybe someday someone will fix it. If only Nvidia would not cancel DirectX old version retrocompatibility from their drivers there wouldn't be problems today like the stars and sky abscence from Thief, the color banding problem of Deus Ex and so on. : \