The HTML macro is:

{html}<object classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" width="160" height="136" codebase="http://www.apple.com/qtactivex/qtplugin.cab">
<param name="SRC" value="http://192.168.0.1:80/qtmedia/Media/ThinkDifferent_i.jpg">
<param name="HREF" value="http://192.168.0.1:80/qtmedia/Media/ThinkDifferent.qtl">
<param name="TYPE" value="video/quicktime">
<param name="AUTOPLAY" value="false">
<param name="CONTROLLER" value="false">
<param name="TARGET" value="quicktimeplayer">
<embed src="http://132.185.125.247:80/qtmedia/Media/ThinkDifferent_i.jpg" href="http://192.168.0.1:80/qtmedia/Media/ThinkDifferent.qtl" target=quicktimeplayer type="video/quicktime" width="160" height="136" autoplay="false" controller="false" pluginspage="http://www.apple.com/quicktime/download/">
</embed>
</object> {html}

The error is:

Caused by: javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: Attribute name "margin-top:margin-top" must be followed by the ' = ' character.
at com.icl.saxon.om.Builder.build(Builder.java:273)
at com.icl.saxon.Controller.transform(Controller.java:936)
at com.atlassian.confluence.importexport.impl.WikiExporter.convertXHtmlToXslFo(WikiExporter.java:164)

If we can't guarantee that the contents of an HTML macro will be exportable, we should probably strip it silently during the export.