Unnecessary teaser from Feedburner

Hi all,

I've got an annoying issue with feeds coming from Feedburner, seems they have strange mechanism of creating teasers I never requested:)
So say all my core teasers are set to Unlimited within unlimited filters on leech nodes, but anyway I get strict teaser from Feedburner feeds.
The funniest thing that Feedburners node->body is presented in full mode:(

Code illustration:
Teaser parsed from Feedburner feed item:
<p>Storyboards and stills from the motions made by Emie (0 hits).</p>
Body parsed from Feedburner:
<p><img src="http://designyoutrust.com/wp-content/uploads/emie.jpg" alt=""><br /> Storyboards and stills from the motions made by <a href="http://designyoutrust.com/go.php?http://www.byemie.com/" title="(0 hits)">Emie</a> (0 hits).<br /> <img src="http://feeds.feedburner.com/~r/dyt/~4/179140997" height="1" width="1" /></p>

NB: that's not a Drupal parser... I hope?
Am I right think that it's a trouble (feature) of a Feedburner and why it's understandable by Leech parser?