XML tags are displayed after copy&paste word-doc in office importer

As stated in the users-mailing-list:
http://lists.xwiki.org/pipermail/users/2009-August/016953.html

We have a problem with the new "Import Office Content" functionality in
XWiki Enterprise 1.9.2.22089.
The problem exists with Internet Explorer 6.0.2800.1106; with Firefox
3.0.7 everything is working fine ....

After copy&paste of some word content into the import office panel some
xml tags are visible in the imported text:

<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office"
/>

To reproduce:
1. In Edit mode, selected Import Office Content.
2. In Office Importer, select Clipboard, copy&paste some word text and
select Import. (filter styles / don't filter styles doesn't matter)
3. Preview / Save and view