specific date urls are throwing 500s

[timball]

From goog webmaster tools a pile of urls of the form http://capitolwords.org/date/< YEAR >/< MO >/< DAY >/ are throwing 500 errors.

specific but not extensive example:
http://capitolwords.org/date/2001/03/22/
but
http://capitolwords.org/date/2001/03/ works and even lists the 22nd as a valid date . when you click on the 22nd from that month url it falls down go boom .

it doesn't appear to be ALL dates just "some" and by "some" goog wmt claims 157-ish

as a for instance:
http://capitolwords.org/date/2004/09/13/ <--- works
http://capitolwords.org/date/2004/09/09/ <--- doesn't

--timball

[drinks]

Hum. I need to add sentry I guess.