Recently upraded to CiviCRM 4.7.3 on this site: http://oaem.ca/
After the upgrade, the membership signup and renewal process is broken in the following way.
The signup/renewal form at https://oaem.ca/civicrm/?page=CiviCRM&q=civicrm/contribute/transact&reset=1&id=1 now includes an additional "Organization Details" form, which is not set in any profile, and which is not wanted. It appears to conflict with the membership data that I want to collect, and which is collected using a custom contribution profile.
Filling in both forms appears to work at first, but when the user reaches the confirmation page, they see this report:
Please correct the following errors in the form fields below: Organization Name is a required field. Phone (Main) is a required field. Email (Main) is a required field. Street Address is a required field. City is a required field. Postal Code is a required field. Country is a required field. State/Province is a required field.
So the additional data on the 1st screen does not get passed to the final screen.
This persists even if I switch off the the custom profile form in an attempt to use the 'default' form which is being added.
Any suggestions as to what is wrong and how to fix it very gratefully received.