Hi, I’d like to say that I’m running into that problem as well.
I’ve hooked up WordPress with a phpBB forum with WP-United, and when I activate graphene, the comments aren’t displayed on the blog.
It is still possible to comment through the blog, and the comment will appear in the corresponding thread in the forum, but still nothing on the blog.
I’m still learning all this, I’m not a web coder at all, so Graphene is very useful with all the customization possible within the WordPress admin interface.
I still have to figure out how to have a common header and integrate the styles correctly with the forum, but that’s another problem, and if anyone has a solution to make the comments show up with Graphene while using WP-United, it would be really helpful.