My data directory has 86 of these files. 13 from 2/2/2010, 22 from 2/9/2010, 3 from 3/21/2010, 23 from 5/18/2010, and the rest from within 20 minutes of now. Any of the files on any one day are within an hour of each other.
So, by your earlier statement then, can I just delete the files that are older than today? I guess I can live with 20 or so of these, but 86 is just too many.
I guess one option is to change the default data directory.