Oh jeeze… I haven’t seen this problem in a while.
The engine it uses (Ogre) uses CEGUI, which Special K also uses for text OSD and achievement popups. It’s necessary to disable CEGUI for this game.
Use this version of Special K, it has a workaround:
+ Added workaround for Ogre games that load CEGUI before Special K does
SpecialK64.7z (7.6 MB)