DOCBOOK-APPS: xhtml images not aligned

In graphics.xsl in the XHTML subdirectory of the XSL stylesheets
version 1.58.1 it says:

"Finally, align and valign are troublesome. Horizontal alignment is now
 supported by wrapping the image in a <div align="{@align}"> (in block
 contexts!). I can't think of anything (practical) to do about vertical
 alignment."

However, when one generates XHTML using the XHTML stylesheets the
following is generated:

<div class="mediaobject"><img src="images/good2.png" align="center"
alt="Google, as viewed from the lynx web browser ;)" /></div>

Am I missing something here?

IOIOIO
I~io~O
IOIOIO