Seems that quite recent sites also see changes too: [webmasterworld.com...]
James_Dale
7:44 pm on Aug 10, 2003 (gmt 0)
Did your site drop a few positions at the same time as this update?
AthlonInside
8:09 pm on Aug 10, 2003 (gmt 0)
I also have a change long ago and the recent DUMP from dmoz seems to have exclude my site (or maybe Google itself has ignore the info). So there are no more DMOZ desciption in SERPs although my site is still in DMOZ.