The following XSL-FO causes a complaint about the graphics being out of limits
and DOES NOT render at the scaled size. The specification states that a height
of 100% should cause the area to be set at the same size of the parent (which
should be the size of extent in this case.

<?xml version="1.0" encoding="utf-8"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">

	<fo:layout-master-set>
		<fo:simple-page-master master-name="Form"
				page-width="210mm" page-height="297mm"
				margin-top="10mm"  margin-bottom="10mm"
				margin-left="10mm" margin-right="10mm"
				padding="0">
			<fo:region-body 
				margin="0" margin-top="32mm" padding="0"/>
			<fo:region-before extent="32mm"
				margin="0" padding="0"/>
		</fo:simple-page-master>
	</fo:layout-master-set>
    
    <fo:page-sequence master-reference="Form">
	    <fo:static-content flow-name="xsl-region-before">
			<fo:block text-align="center"
					height="100%" width="100%"
					border-style="solid" border-color="orange" border-width="0.25mm">
				<fo:external-graphic
						border-style="solid" border-color="black" border-width="0.25mm"
						scaling="uniform" scaling-method="resample-any-method"
						height="100%" content-height="scale-to-fit"
						src="logo.jpg"
						/>
			</fo:block>
		</fo:static-content>
		<fo:flow flow-name="xsl-region-body">
			<fo:block-container
					height="100%" width="100%"
					border-style="solid" border-color="blue" border-width="0.25mm">
				<fo:block text-align="center" font-size="20pt" font-family="serif"
line-height="30pt">
		    		LOGO CHECK
	    		</fo:block>
    		</fo:block-container>
		</fo:flow>
    </fo:page-sequence>
    
</fo:root>