The subject says it all... I have the latest version of the plugin installed (the Beta v2.1beta2), latest WordPress, latest BuddyPress.
If I log in as a subscribed user, I don't have access to the BuddyPress pages - activity, groups, and members. If I log in as an admin user, I do have access.
In the membership subscription level, the BP plugin, the BP pages, and certain groups are in the positive rules for that level.
I tried the fix discussed in this thread, but no joy.
Laurie (one of Lisa's staff...)