Object of class could not be converted to string

Dear all, We are experiencing this error: "Object of class xxxClass could not be converted to string" I have searched google a lot mostly the results are for Drupal or badly coded sites. I have further found out that the issue is with PHP 5.2 version. There isn't a problem with the script as it works on other servers with prior versions, so I am wondering if any one has any tips or ways to go about this error. Unfortunately we are in a position whereby we cant downgrade PHP as it's a shared hosted server. Any help will be appreciated. Thanks, Web: http://www.elemental.co.za