Everything base wise is updated (I own diamond), 2.4a moved to according folders, redownloading the .hak files from the .zip rather than the unpacker- however, I don't know if I either don't have, or cannot find my tlk folder. It's either just the Ravenloft stuff is sitting there or that is in fact the base folder. Unpacking, and will try again, will update after retry.
Update: After trying everything you've suggested, even lowering my setting to their low (didn't switch ratio, however) it is to no change.