When using the TEST pages at the atlassian demo confluence site, any export of a test page to HTML or XML generated a zip file that could not be unzipped - the error reported (Fedora Core 1 Linux) was:

$ unzip TEST-6,241-22Jul2004-08_32_17.zip
Archive: TEST-6,241-22Jul2004-08_32_17.zip
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of TEST-6,241-22Jul2004-08_32_17.zip or
TEST-6,241-22Jul2004-08_32_17.zip.zip, and cannot find TEST-6,241-22Jul2004-08_32_17.zip.ZIP, period.