Both IE10 and the RSS reader I use (https://inoreader.com/) are complaining that the xml for my favorites RSS has an error:
Reference to undefined entity 'raquo'.
Line: 10 Character: 35
<description>Boxcryptor Forums » User Favorites: giangi</description>
This XML document is invalid, likely due to invalid characters. XML errors: Undeclared entity error at line 10, column 41