We previously had something similar with Android devices not accepting the cert. I'm curious what device you've used to test this. Thus far, we haven't had this issue anymore with the .228 version of Unleashed.
If I'm not mistaken, that Ruckus CA is the AP itself, because it's a self-signed cert. In other words, it's unlikely anyone will have that CA installed (unless added manually to trusted CA list). I don't seem to have this problem on a Iphone or Mac. Don't have other testing equipment with me at the moment.