Posts visible outside group

Issue Summary

I know this issue has been brought up before (http://drupal.org/node/244139), but it seems it never really got solved. I am using OG 6.2.RC3 and OG-Forum 6.2.RC1 (was having issue with http://drupal.org/node/549542), so had to use an older version.

Here's the problem. Users outside the OG can't see the forum containers, however the forum topics are displayed on the 'New Topics' block. And when they click on a new topic, which is in a group they're not members of, they can see the post and reply to it.

I have OG Access Control enabled. Any help?