Reproduce: - create a settings/portal_entry object with the name "foo.bar" - set a Logo -> The logo will not be shown in the portal Why: - a css class that contains the name of the portal entry object is created and used as an selector to show the logo of the portal entry management/univention-portal/www/tools.js getIconClass() var iconClass = lang.replace('umcPortal-{0}', [name]); - but a . (dot) is not allowed in a css selector https://drafts.csswg.org/css2/syndata.html#value-def-identifier
*** This bug has been marked as a duplicate of bug 49526 ***