recent (?) change in docbook rendering of inlinemediaobject svg images

I've been working on updates to the KMyMoney handbook on and off for  
several months, but today I just noticed that some rendering has  
changed, although I am not sure the last time it worked the "old" way.   
These are all of the form
<guiicon>
   <inlinemediaobject>
     <imageobject>
       <imagedata fileref="tag-new.svg" format="SVG"/>
     </imageobject>
   </inlinemediaobject>
</guiicon>

The last time I used meinproc5 (at minimum a month or two ago) these  
rendered as small icons, no taller than the line of text where they  
were rendered.  Today, with either meinproc5 or meinproc6, they are  
rendered huge (almost the full width of the page, and with a light gray  
bar below them the full width of the page.

Before I start adding random bits to the docbook to try and beat the  
images back down to proper size, I figure I'd ask whether I missed  
anything in the relevant change logs, and whether there is a  
recommended way to do this.

Thanks for any suggestion, even if it is just a pointer to the  
appropriate fine manual I need to (re)read.

Jack