login custom logo doesnt show for mapped domain

See screenshot.

the custom log doesn't show when I log in using the mapped domain.

Also note, this domain was previously pointing to a wordpress install, and has only recently been mapped to a MU site.

What gives? How do I fix this? Do I have to add CSS? IF I do, then I'd rather not use the plugin then!? Please advise :slight_smile:

Thank you.