gjschaller wrote: Any thoughts on this? Can anyone else replicate it? Do you need access to a test site to troubleshoot it?

If the default image is being picked up by CB from your template and not being picked up from Kunena then it is a Kunena integrations issue and you should bring it up on the Kunena forums.

gjschaller wrote: It's also coming up on the CB Userlist, though, which is why I brought it up here.

The fact that it is showing the CB Default icon, and not the Kunena default icon, is also an indicator.

Then I am guessing that you did not also provide a thumbnail default profile image in your template folder.