If you have a blog with RSS feeds, make a habit of checking it regularly (once a week should be enough).  Blog tools are often lax on character encoding and bloggers' tendency to copy-and-paste across tools can occasionally result in illegal characters seeping into your feeds, making them unparseble.  If you are using IE, just clicking on the feed link should be enough since IE will barf on illegal characters in XML documents.  Thank you for listening.  Good day.