Works with Google Reader too. It must be a similar expiry issue as "All items" does show everything including the old ones.
Andras

On Thu, Sep 10, 2009 at 10:35 AM, IOhannes m zmoelnig <zmoelnig@iem.at> wrote:
IOhannes m zmoelnig wrote:

my guess is, that feeds works correctly, but drupal uses some timeout mechanism in order to discard old items.
since the news feed on puredata is not very heavily used, most items are already too old to be included in the drupal aggregator.

and with this in mind i checked the "settings" of the drupal feed aggregator and indeed it does say "discard items older than: '16 weeks'"

seems to be a debatable feature of drupal; see http://drupal.org/node/60468