[JSWolf]

Originally Posted by maraskan_user

Say you have a CSS file like this:

@namespace h "http://www.w3.org/1999/xhtml";
.StyleA {
  color: red;
  font-size: 2em;
  font-style: italic;
}
.StyleB {
  color: red;
  font-size: 2em;
  font-style: italic;
}

Is it normal that text that uses StyleA does not receive any formating, while with StyleB it does? (See sample epub)

Until this is fixed, the solution is to install the Quality Check plugin in Calibre and use it to search for @namespace and then in the Calibre editor, remove it.