The problem there was the use of the style tag in a the wiki data. This does not look like the same problem to me.
XML Parsing Error: not well-formed Location: http://localhost:8080/seam-blog/seam/index.xhtml Line Number 83, Column 16: </div> ---------------^
The errors are identical... though the import.sql fix did nothing for me. Where did this error come from? The background is yellow... there's no seam debug info or any of that. It's pretty strange.