Code Error

I am currently using the The Writer. I have been getting the error below since I upgraded to Worpdress 3.5. Please, can anyone help with a solution to this?

Warning: Missing argument 2 for wpdb::prepare(), called in /home/oluwatob/public_html/wp-content/themes/writer/library/tfuse_framework/functions/core.php on line 29 and defined in /home/oluwatob/public_html/wp-includes/wp-db.php on line 990

The URL of my site is http://www.oluwatobisoyombo.com. This error does not affect the front end, but I see it everywhere in the dashboard (Adding new posts etc).

Thanks in anticipation of your support