Q&A plugin generating warning

I am receiving this error message on two site with Q&A installed. One has no configuration of the Q&A plugin the other has some minro setting changes. Both generate similar error messages.

Both these sites use the same theme - You can see the main example here> http://reading.simplecsr.com/

Warning</b>: Missing argument 2 for QA_Core::wp_title() in <b>/home/simplecs/public_html/reading/wp-content/plugins/qa/core/core.php</b> on line <b>607</b>

<b>Warning</b>: Missing argument 3 for QA_Core::wp_title() in <b>/home/simplecs/public_html/reading/wp-content/plugins/qa/core/core.php</b> on line <b>607</b>