missing ubuntu version in the trail of the html pages

Ok, found it,

The <xsl:template name="db2html.linktrail"> in ubuntu.xsl is wrong and have to be replaced by :
<xsl:template name="db2html.links.linktrail">

We have also to put everything in a <div class="trails">…</div> to have the background behind this trail.

I have a test version with some changes and I am able to observe what you are referring to.
However, it is not clear how to do your second point. Is the "<div class="trails">…</div>" part a change from the "trail" one that is already there or an additional one on top of that? I have a tried both ways and do not notice a difference when viewing the resulting HMTL.

i.e. I have this now:

<xsl:template name="db2html.links.linktrail">
  <xsl:param name="node" select="."/>
  <div class="trails">
  <div class="trail">
        <a href="https://help.ubuntu.com/12.04" class="trail">Ubuntu 12.04</a>

(Ignore the 12.04 part, as it hasn't been changed to 13.04 yet, and it doesn't appear to have been done for 12.10)

Sorry, I wasn't clear enough. I should have posted my solution a long time ago. Seems OK for me like that, I have done the same thing on my local copy.

When I reported this bug, I had that code:
<xsl:template name="db2html.linktrail">
  <xsl:param name="node" select="."/>
  <div class="trail">…

And I fixed it with that:
<xsl:template name="db2html.links.linktrail">
  <xsl:param name="node" select="."/>
  <div class="trails"><div class="trail">…

Same result :)

Thanks.