In-Portal is using CKEditor as it's WYSIWYG editor. Alongside built-in plugins we've developed some custom ones, including "my_document" plugin, that allows to add nice links to uploaded documents inside CMS blocks:
It does look right, but URL to the icon next to document link is using absolute path:
This causes problems, when website is shown under different domains, because icon is always loaded from domain, where content was entered.
Use relative path for document type icon images.