If you have a blank page when you are browsing your forum with the Mobile Style, this is some templates used are not designed to be run with the mobile style.
Example: if you are using Project Tools and have almost 1 project in the forum index page, your forum.php page will be blank without any error message.
Workaround: remove all of your non-original vBulletin 4 templates / features which could cause this issue.
And if the dev of any problematic feature have an update related to Mobile Style, apply it to have you features back
Example: if you are using Project Tools and have almost 1 project in the forum index page, your forum.php page will be blank without any error message.
Workaround: remove all of your non-original vBulletin 4 templates / features which could cause this issue.
And if the dev of any problematic feature have an update related to Mobile Style, apply it to have you features back