I was counting the shot.xxx file in the totals. It is a tga format screenshot made when saving, displayed during loading and in the save/load windows.
The story files may not have been completely saved. It is possible the size can go down a bit (it can take less room to list a quest as completed than keep a detailed track of progress), but checking my old saves I only noticed a couple times where the size dropped in successive saves, and it was on the order of a couple KB at most. Generally, the story.000 file increased relatively gradually from 3933 to 4285KB.
There is something you can try to check if this is the problem, but make a copy of your latest save as well as your last working save before trying it; if it doesn't help you do not want to make things worst.
Copy the two story.* files from the copy of your working save into the copy of your latest save, overwriting the files there. If you can then load the copy of your latest save, you know the original story files were incomplete or corrupt. Depending on how far apart the 2 saves are, continuing with the old story files may cause minor to serious problems. You may reset some quest information and not be able to complete or even recieve some quests, due to parts of DD thinking you are at different points in the game.
How old is your most recent working save? The safest thing to do would probably be to revert to that save (and maybe save under unique names more frequently). <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />
