[xsl] xsl:attribute vs "expected comment or PI"?

[Eric Scheid <eric.scheid@xxxxxxxxxxxxxxx>]

I'm baffled. Why is this not working? The error I'm getting is "expected
comment or processing instruction". The problem is somewhere within the
second xsl:attribute ... if I take it out, no error. I've tried switching
the two xsl:attributes around, I've tried jamming it all onto one line, I've
tried taking the other xsl:attribute out ... no luck.

<xsl:template match="fmp:FMPXMLRESULT">
<ul>
<xsl:for-each select="fmp:RESULTSET/fmp:ROW">
 <li>
  <a>
   <xsl:attribute name="href">authors-<xsl:value-of
select="fmp:COL[1]/fmp:DATA[1]"/>.html</xsl:attribute>
   <xsl:attribute name="title">
    <xsl:value-of select="fmp:COL[2]/fmp:DATA[1]"/> author
    <xsl:if test="fmp:COL[2]/fmp:DATA[1]!='1'">s</xsl:if>,
    <xsl:value-of select="fmp:COL[3]/fmp:DATA[1]"/> article
    <xsl:if test="fmp:COL[3]/fmp:DATA[1]!='1'">s</xsl:if>
   </xsl:attribute>
   <xsl:value-of select="fmp:COL[2]/fmp:DATA[1]"/></a></li>
</xsl:for-each>
</ul>
</xsl:template>

The input data looks like this:

<FMPXMLRESULT xmlns="http://www.filemaker.com/fmpxmlresult";>
<RESULTSET FOUND="345">
<ROW MODID="6" RECORDID="24">
    <COL><DATA>A</DATA></COL>
    <COL><DATA>18</DATA></COL>
    <COL><DATA>15</DATA></COL>
</ROW>
<ROW MODID="6" RECORDID="25">
    <COL><DATA>B</DATA></COL>
    <COL><DATA>18</DATA></COL>
    <COL><DATA>15</DATA></COL>
</ROW>
</RESULTSET>
</FMPXMLRESULT>