I feel a bit daft, but for the life of me I cannot figure this out.
I added border radius to to the styling of the menu:
.sf-menu a {-moz-border-radius:10px; border-radius:10px;}
...but little white corners remain. This looks weird on a black background!
I have tried placing overflow:hidden; under various things in the child style.css but nothing works.
Any ideas?