I've created a form that contains, among other standard Gravity Form fields, product, name, address, and credit card fields. When I complete the fields using any one of the test card details provided by Stripe and submit the form, the test payment is correctly processed but there are a series of seven warnings that briefly appear directly below the submit button on my form as it's being processed right before being redirected to the confirmation page. Six of them look exactly like this:
Warning: array_key_exists() [function.array-key-exists]: The first argument should be either a string or an integer in /home/rutgersc/public_html/wp-content/plugins/gravity-forms-stripe/stripe.php on line 2356
I'm running WordPress 3.4.2, Gravity Forms 1.6.10, and Gravity Forms + Stripe 220.127.116.11.
Any ideas? Thanks for your help debugging!