[support] trouble with aggregator

[Christina Callahan]

I'm stumped with Aggregator and would like to see if there is anyone 
able to point me in the right direction.

I am reading in a number of individual feeds using Aggregator.  With 
each feed, I created a title and set the url to be something like 
http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1.

These feeds populated with the appropriate content when I created them, 
however, I've recently noticed that the feed is no longer updating 
inside my Drupal site.  As I began investigating this a bit, I found 
that when I click on "update items" that the link is getting rewritten 
to http://webapps.css.udel.edu/calendar/index.php?topicid=1.   The 
"format=rss" was being removed.  

I went into the table for aggregator_feed and saw that the link field 
shows 
http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1 and 
the url field shows 
http://webapps.css.udel.edu/calendar/index.php?topicid=1.  I edited the 
table for aggregator_feed and set the link field to be 
http://webapps.css.udel.edu/calendar/index.php?format=rss&topicid=1.  
When I visit the aggregator feed page, the posted URL is what I'd expect 
(with 0 items), but when I click on "update items", the value for link 
gets re-written again to be 
http://webapps.css.udel.edu/calendar/index.php?topicid=1.

I'm not sure that this will solve my problem of items not updating, but 
it doesn't seem like the link and url should be different or that the 
information should change when the "update items" is clicked.  Is 
anybody else seeing this behavior?  Any thoughts?

Additional notes - I'm running cron hourly.  My site is running 6.13.

Thanks!
Tina