[Ed Kolis]

I would imagine it controls the ratio between the "frame rate" and the "logic rate" of combat - if you set it to a higher number, the game would (assuming it's actually implemented) compute the combat results in more detail with better accuracy. I suppose lowering it could reduce the size of the combat logs, at the expense of detail though... might be worth a shot...

edit: odd, you're right, there is no mention of it in the modding doc... maybe it was added more recently?

edit 2: but nothing in history.txt either... this is strange :?