Hey Jo,
yep, the a-tag inherits the body line-height. The problem is that no style settings end up on the a, they all end up on the SVG, and we can’t address the a-tag either because it doesn’t have an ID or a class. So I just added this as a bug to our system.
An intermediate solution is to wrap the icon with a container (or in the upcoming 1.5beta with a DIV) and set the link there. This does not change anything in the markup. It is only important that you set the container width to “auto”.
Best regards,
timmse