Because of the release of My Little Forum 2.4.8 I released a new version of the theme Responsive 1, which is compatible with the new MLF-version. You'll find the list of changes in the linked release announcement on Github.
For the browser compatibility see the message about version 0.1.1.
Please report issues and opinions here or on Github.
The theme is now the standard theme of this installation of My Little Forum 2.4.x (x >= 8).