Sprout Email conflicts with Craft Contact Form I have the latest versions of Craft CMS, Sprout Email and Craft Contact plugins. Sprout behaves fine with some notifications I have set up. However, if I submit a contact form it throws a PHP error - mb_convert_case() expects parameter 1 to be string, array given

If I disable Sprout, then Contact Form works fine.

Looking at the logs, I see that submitting the form triggers a 'When an entry is saved' event and Sprout starts looking at whether it is something it should handle and then chokes when trying to parse it as an entry.

I finally got things to work by disabling the "Enable Sent Email tracking" feature in Sprout Email, but I would prefer not to have to do that.

Has anyone encountered anything like this or have any thoughts on this? Thanks for any input!
This issue has been resolved in Sprout Email 3. 

Be sure to read the upgrade notes. This is a major release and some scenarios may require a few manual steps to get updated.