Warning: Missing argument 2 for topmenudesign() in /home/ethiomys/public_html/inc/menu.inc.php on line 250

I have been stuck on how to fix the error below on that appears on top of all my pages except the 'Forum' page... Dolphin 6.0.0004 CR2 hosted on Hostforweb:

Warning: Missing argument 2 for topmenudesign() in /home/ethiomys/public_html/inc/menu.inc.php on line 250

Warning: Cannot modify header information - headers already sent by (output started at /home/ethiomys/public_html/inc/menu.inc.php:250) in /home/ethiomys/public_html/inc/design.inc.php on line 667


Help pls, anyone?