Request for help in getting results of FindBugs stylesheets to validate

I'm now trying to validate the results of applying each of the  
FindBugs style sheets
and part of our nightly smoke test.

I've encountered a few problems. XML stylesheets isn't an area of  
expertise of mine,
so I'd appreciate any help.

For default.xsl:

  We have:
    <tr class="detailrow{position() mod 2}">
        <td/>
        <td>
            <p id="{$warningId}" style="display: none;">
                <a href="#{@type}">Bug type <xsl:value-of  
select="@type"/> (click for details)</a>
                <xsl:for-each select="./*/Message">
                    <br/><xsl:value-of select="text()"/>
                </xsl:for-each>
            </p>
        </td>
    </tr>

The problem here is that when this is applied to

	      <Message>In method org.apache.bcel.generic.Type.&lt;static  
initializer&gt;()</Message>

it generates:

        <br/>In method org.apache.bcel.generic.Type.<static initializer>()

which won't validate. This problem doesn't seem to come up for the  
other style sheets, although the way
in which they include the Message element in the resulting html looks  
identical.

Any ideas?

Second question:

default.xsl and fancy.xsl use

        <xsl:output method="xml" ...

while plain.xsl and summary.xsl use

        <xsl:output method="html" ...

Should they all be consistent?

        Bill