How to reproduce :

• add this joined file into the \web\WEB-INF\param\content-types\web\petitesannonces.xml
• add this joined folder into the \web\WEB-INF\param\content-types\web\stylesheets\content\

Then, restart and add this content into a page.
The glyph appears well in the tool panel but it does not appears in the page. The speudo class :before is not defined.