I didn't make it!
2.4 is a large, very complex file and it needs to be closely guarded to maintain all segments as compacted on the disk as possible. If you begin to have the slightest glitch consider defragmentation. System Mechanic is the only 'file specific' degragmenter I know of at the moment. If you have it, use it often - a good practice would be to do it before you ever start the game; ya' jus' neva can tell when it will give you the edge over the guy that didn't. ;)