This is similar in nature to my other issue with multi-portals where a single user is used across portals (the group issue is now resolved). Currently, forum posts from all portals are displayed in "My Topics" in the user area. I think it'd be better to make "My Topics" portal specific, or best to offer settings for portal specificity.

Having said that, I've just been asked to accomplish a scenario where it would be great to list all posts from all portals.

I guess having the ability to control which portals are displayed in the My Topics area, for each portal, would be ultimate.