Feedburner refuses an Atom feed generated by a Google service

Question

Here is the Atom feed I want Feedburner to use:

https://code.google.com/feeds/p/ankidroid/downloads/basic

It looks pretty valid:

<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom">
 <updated>2011-11-07T01:09:09Z</updated>
 <id>http://code.google.com/feeds/p/ankidroid/downloads/basic</id>
 <title>Downloads for project ankidroid on Google Code</title>
...

And feedvalidator.org says "Congratulations! This is a valid Atom 1.0 feed"

PROBLEM:

Feedburner says "We could not find a valid feed at that address"

QUESTION:

How to make Feedburner accept this feed?
Or is it a known bug?

Answer 1

You're right it won't work that way, but there's a work around, http://search.twitter.com/search.atom?q=from:username

;)