Many users are now creating pages and some are having trouble with the exports. I've narrowed it down to the pages not being "perfect"

e.g. the following table header exports ok

the following breaks

com.atlassian.confluence.importexport.ImportExportException: com.atlassian.confluence.importexport.ImportExportException: com.atlassian.confluence.renderer.WikiRenderException: javax.xml.transform.TransformerException: org.xml.sax.SAXParseException: The element type "th" must be terminated by the matching end-tag "". at com.atlassian.confluence.importexport.impl.PdfExporter.prepareExportXSLFo(PdfExporter.java:272) at com.atlassian.confluence.importexport.impl.PdfExporter.doExportEntity(PdfExporter.java:166) at com.atlassian.confluence.importexport.impl.AbstractRendererExporterImpl.exportPage(AbstractRendererExporterImpl

both display fine in normal confluence page viewing.

Can this be fixed? It is very hard to ask staff to write perfect pages, perhaps some sort of page validator would help.