Similar issue posted in http://issues.civicrm.org/jira/browse/CRM-966
Smart group membership does not show within individual contact record "group" tab. However, record does appear in smart membership list.
Given "will not fix" status in previous versions (2006) due to what looks like overhead issues but not having membership display individual record is very inefficient. If a membership flag is already set as part of record in 2.1, is there still a reason not to do this?
Smart groups is a key automated interaction with Drupal/user registration management.
Please reconsider making this fix. Thank you.