The PDF generated from following simple fo produces the error "Illegal operation
'Tm' outside text object." when viewed in Acrobat.

    <fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"
xmlns:svg="http://www.w3.org/2000/svg">
      <fo:layout-master-set>
        <fo:simple-page-master master-name="normal" page-width="5in"
page-height="5in">
          <fo:region-body/>
        </fo:simple-page-master>
      </fo:layout-master-set>
      <fo:page-sequence master-reference="normal" white-space-collapse="true">
        <fo:flow flow-name="xsl-region-body">
          <fo:block>
            <fo:character font-size="96pt" character="A" />
          </fo:block>
        </fo:flow>
      </fo:page-sequence>
    </fo:root>