CiviCRM Community Forums (archive)

Looks like you've got cached 3.0 templates (since that function exists in 3.0 but not in 3.1). Try deleting all folders / files under templates_c.

My 'greps' show that the mis-spelled function exists in 3.0 - CRM_Utils_Date::checkBrithDateFormat) - and that the function name and calls to it were corrected in 3.1 to CRM_Utils_Date::checkBirthDateFormat).

So please check your copy of CRM/Utils/Date.php and see which function it contains and see if you find any references to the mis-spelled function in your 3.1 codebase.

Also make sure you don't have an older copy of the CiviCRM codebase anywhere UNDER your sites/all/modules folder - as Drupal will potentially load anything there. Finally, I would triple check that you've deleted all files/folders in /public_html/sites/default/files/civicrm/templates_c