Message Title

When importing into Disqus it reports that the import had some errors. Looking at https://import.disqus.com/<disqus-id>/?a=1 one can view the import reports. In our case we have some null comments. For example

wxr.xml

Missing or invalid message

{"post":{"author_email":"blog@lauracowen.co.uk","author_name":"Laura","original_id":"15868","author_url":null,"date":"2010-06-16T09:55:00UTC","message":null,"metadata":"wp_id=15868"},"thread":{"date":"2009-05-13T19:16:00UTC","link_url":"http://in.relation.to/2009/05/13/InstantMockupForEclipseSWTApplications","link_metadata":"13-05-2009-InstantMockupForEclipseSWTApplications","title":"Instant Mockup for Eclipse SWT Applications"}}

wxr.xml

Missing or invalid message

{"post":{"author_email":"thomas.tom.mueller@gmail.com","author_name":"Thomas Mueller","original_id":"18241","author_url":"h2database.com","date":"2011-02-03T15:45:00UTC","message":null,"metadata":"wp_id=18241"},"thread":{"date":"2011-02-02T04:50:00UTC","link_url":"http://in.relation.to/2011/02/02/ThisIsJustNuts","link_metadata":"02-02-2011-ThisIsJustNuts","title":"This is just nuts..."}}

The problem is most likely with the selection of the comment content div which can in some cases contain more than a single class, eg class="commentText plaintext".