>Craig --
>
>You've told me what you do, but not why.
>
>What happens if i don't check off "recompile all files"? What's the danger? How often does it happen?

Only as often as you want to have a hard-to-find bug which turns out to be something you fixed when your system time changed, or on a file you got from a different timezone or some other interesting combination. Basically, you mess with file times and have a new prg / old fxp combination with timestamps on these files in the wrong order, and the boredom is miraculously vanishing.