Eoghain: Note: If this is due to a corrupted save file (my best guess): I've tried deleting the pre-level-up files and going through it again; I've even deleted all the save files and replayed the prologue to get to the level-up point: same issue.
So... if it's a corrupted save file then it's a basic-data file that they all refer to that is not in the saved-games directory.
How are you trying to level up? If you're playing on one of the harder difficulty levels, you need to go into the Meditation screen and select from there. You can't do it just by hitting "C" from the main game screen. (This is to prevent you from leveling up during combat).
