Version:           3.5.7 (using KDE KDE 3.5.7)
Installed from:    SuSE RPMs
OS:                Linux

viewing this xml web page:
http://svn.macports.org/repository/macports/trunk/dports/
just shows a blank page in konqueror, where firefox interprets it right. 

the page source starts with:
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="/svnindex.xsl"?>
<!DOCTYPE svn [
  <!ELEMENT svn   (index)>
  <!ATTLIST svn   version CDATA #REQUIRED
                  href    CDATA #REQUIRED>
  <!ELEMENT index (updir?, (file | dir)*)>
  <!ATTLIST index name    CDATA #IMPLIED
                  path    CDATA #IMPLIED
                  rev     CDATA #IMPLIED>
  <!ELEMENT updir EMPTY>
  <!ELEMENT file  EMPTY>
  <!ATTLIST file  name    CDATA #REQUIRED
                  href    CDATA #REQUIRED>
  <!ELEMENT dir   EMPTY>
  <!ATTLIST dir   name    CDATA #REQUIRED
                  href    CDATA #REQUIRED>
]>
<svn version="1.4.0 (r21228)"
     href="http://subversion.tigris.org/">
  <index rev="26241" path="/trunk/dports">
    <updir />
    <file name="PortIndex" href="PortIndex" />
    <dir name="aqua" href="aqua/" />
    <dir name="archivers" href="archivers/" />