HI - we are using hustle on this site - as a slide in and I installed the shortcode at the page here http://prana-bar.com/contact/
In both cases - no matter what I do in the settings - the "email" field is inaccesible - the title doesn't show and you can't fill in the field. If you hit tab a few times it shows up.... I've updated everything (WP, plugins, etc)....
Part of why we have signed on with MPMU is because of Hustle - we used to use sumome for all our subscribe forms but they changed their pricing model and it was not sustainable for us. That being said, I have found Hustle REALLY unreliable - it conflicts with the themes we use, conflicts with the caches we use, and has really sucked up a lot of time. We are using some of the most standard, popular themes and plugins and Hustle is a bit of a hot-house flower.... I really think you guys need to pay attention to this important tool and make it a bit more stable.
I've granted support access. please let me know what's next.