Consider:
<section version="5.0" xmlns="http://docbook.org/ns/docbook">
<title>A section</title>
<figure>
<title><inlinemediaobject>
<imageobject>
<imagedata fileref="img.svg" scale="10"/>
</imageobject>
</inlinemediaobject></title>
<para/>
</figure>
</section>
Transforming to webhelp using stock webhelp/xsl/webhelp.xsl and saxon-6.5.5 yields:
language: en
Error at xsl:apply-templates on line 598 of
file:/usr/.../docbook-xsl/xhtml/graphics.xsl:
Too many nested apply-templates calls
Transformation failed: Run-time errors were reported
I'd actually like to create a thumbnail presentation link inside the figure's title containing the image in question. The above shows a mimimal version illustrating the problem and may look pointless.
The problem does not appear when embedding an <inlinemediaobject> inside i.e. a <chapter>/<title> element.