MarketPress tiny bug

On marketpress.php, line 5332 is like this:

<br /><span class="description"><?php printf(__('Enabling this field will display a textbox on the shipping checkout page for users to enter special instructions for their order. Useful for product personalization, etc. Note you may want to <a href="%s">adjust the message on the shipping page.', 'mp'), admin_url('edit.php?post_type=product&page=marketpress&tab=messages#mp_msgs_shipping')); ?></span>
That results in a link that looks like this:
:disappointed:mydomain.com/wp-admin/edit.php?post_type=product&page=marketpress&tab=messages#mp_msgs_shipping" target="_blank">http://mydomain.com/%22http:disappointed:mydomain.com/wp-admin/edit.php?post_type=product&page=marketpress&tab=messages#mp_msgs_shipping\"

which obviously returns a 404...