[xwiki-users] Theme not respected on login page

Hi all, I set up a subwiki where the content is restricted to registered users. Only global users (authenticated via LDAP from the main wiki) are allowed. I also set up a color theme and logo. Now when the subwiki is accessed you are automatically redirected to the login page but there the default xwiki theme and logo is used instead of my own. I have to change the permissions for XWiki/DefaultSkin and allow unregistered users and XWikiAllGroup to make the login page respect my theme settings. Is this by design or should I create a Jira bug report? BR, Dennis