Writr theme nag menu bug

I am using Writr on a multisite (subdomains).

I am using the menu from site 1 on the other sites with a set blog/restore blog.

No problem with the generated menu, except that the CSS for the home link for blog 1 is showing up as the current page when on the home page of another site (even though the URL of the nav menu item is correct (linked to site 1 home page).

I couldn’t trace where the wrong class is generated.

Cheers
Mike