What has been done in the refactoring
1. replace QXmlStream* with QDom*
2. remove the old replace-by-hand code
3. simplify the code
4. reduce the code
7 files changed, 411 insertions(+), 576 deletions(-)

There is only one issue, kconfigxteditor won't reformat correctly the current namespaces of the XMLs

the above
<kcfg xmlns="http://www.kde.org/standards/kcfg/1.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.kde.org/standards/kcfg/1.0
      http://www.kde.org/standards/kcfg/1.0/kcfg.xsd" >

will become this,
<kcfg xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.kde.org/standards/kcfg/1.0" xsi:schemaLocation="http://www.kde.org/standards/kcfg/1.0&#xa;      http://www.kde.org/standards/kcfg/1.0/kcfg.xsd">

the issue is in the newline, by removing by hand with $EDITOR fixes the issue.

In the attached image I have modified the main.xml of dictionary and it works.