I’ve tested bbpress with the Genesis 2 themes and the forum index doesn’t work. Some type of strange post page is created that has an image thumbnail on it and text of the index page (last post) but not functional. Change the theme and bbpress works like a charm.

[@seamtv Participant 11 years, 2 months ago]

I have Genesis 2 and a responsive child theme. In my case, the forum index is working, but I, too, get this mysterious image thumbnail and cannot – for the life of me – figure out why it’s appearing. I looked at the code on the page and tracked down the image in my media library but have no idea where the instructions to display it on the page are coming from. If you ever figure it out, please let me know!
If it’s any help, the index appears to be using an ‘archive’ css of some kind. I am wondering if there was a setting at some time to have an image header that has since been deprecated in my theme but has resulted in errant code haunting me?