I've upgraded the formal_white theme to 1.2. At a very first glance it seems to work but any comment/suggestion from the community will greatly help. At the present time there is no custom pix folder in the theme, so it should be very fast to download. The modified files are:
The themes allows the use of two logos, one bigger for the home page and one smaller for the other areas of Moodle. There are no sizes defined for logos in header.html so the size can be modified as needed.