is_email_receipt column default in civicrm_contribution_recur may not be correct
In our instance i have found that the is_email_receipt column had a default of 0 in civicrm_contribution_recur even tho the schema is set to be default 1. It would appear that it was caused by the fact no default was specified in the upgrade script https://github.com/civicrm/civicrm-svn/commit/7f39befd60bc735408d7866b02b3ac7fff1d4eea#diff-9ad8e290180451a2d6eacbd3d1ca7966R354