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[xml] --loaddtd bug or feature?

Hi all,
I'm wondering why xmllint --loaddtd (aka XML_PARSE_DTDLOAD) combined with --format option produce a different result in this 2 test case: 

test case 1:
===========
flgu oslo:~$ cat << EOF | xmllint --format --loaddtd -
> <?xml version="1.0"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
> <html xmlns="http://www.w3.org/1999/xhtml";>
> <body><p></p></body>
> </html>
> EOF
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";> 
<html xmlns="http://www.w3.org/1999/xhtml";>
  <body>
    <p></p>
  </body>
</html>
flgu oslo:~$

This result is the expecting result.

test case 2:
===========
flgu oslo:~$ cat << EOF | xmllint --format --loaddtd -
> <?xml version="1.0"?>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
> <html xmlns="http://www.w3.org/1999/xhtml";>
> <body><p></p> </body>
> </html>
> EOF
<?xml version="1.0"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";> 
<html xmlns="http://www.w3.org/1999/xhtml";>
  <body><p></p> </body>
</html>
flgu oslo:~$
Note the space char inserted bitween </p> and </body>. Why this single space char has broke the reindent process ?
Do you think that test case 2 is getting the espected result or do you think that test case 2 is revealing a bug ? 

The indent process isn't broke if you remove --loaddtd option.

Florent,
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