Thanks for the quick response. I am not using a caching plugin. I just realized that the activity stream of private groups is shown in the built-in activity stream too, so it has nothing to do with your plugin. I will report it on the general bp forums.
Thank you for a great plugin!
However, I think I found a bug.When users are logged out, the activity stream is still displayed, even if “Limit to Logged In user’s activity” is checked.
Even activity for private groups is displayed!I run WP 3.2.1 and BP 1.5.1