Ok. We switched php to 5.4, updated wordpress and updated braintree plugin to 0.1-17 and it doesnt work. At the checkout page it shows the message “Internal error”.
I installed old version of the plugin(0.1-15) and the payment goes thru, however, at the top of the checkout page it shows the message “your browser does not support this type of message”. This message scares the customers away eventhough the payment does go thru.