<xsl:choose> not working -- always results with <xsl: otherwise>?

Hi, I'm trying to use the following choose statement, but when I change my
xml text to test for both conditions, the results of <xsl:otherwise> always
show, never the first <choose> which tests (I thought) to see if the text
node of <measure> is empty. If <measure> is an empty element, I would like
to give the user an input box, otherwise, just show the data already
entered.  Any help appreciated.  Thanks.

The xml is simply either <measure name="firstpass">20 mm</measure> or
<measure name="firstpass/>.

<xsl:template match="measure">
   <xsl:choose>
      <xsl:when test="normalize-space(.)">
          <input type="text" name="{(_at_)name}" value="{.}"/>
      </xsl:when>
      <xsl:otherwise>
           Entered: <value-of select="."/>
      </xsl:otherwise>
   </xsl:choose>
</xsl:template>


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