I am a manager of Telugu (te) group at localize.drupal.org. Lately, I am able to only add suggestions. I could not moderate suggestions. I am wondering if there was any change in permissions, etc.

You need to go to the following page:

http://localize.drupal.org/og/users/14/roles

and grant yourself the "translation self-moderator" role.

This post contains more information: http://localize.drupal.org/node/616