In the past, customers having a large number of e-mail addresses in a Group (over 1 million) may have experienced long delays when in the "Groups and E-mail Addresses" section, after having selected the Group and waiting for the list of e-mail addresses to display in the blue area.
The list of e-mail addresses will now display much faster. Additionally, sorting through the list 200 at a time with the <> links will now operate much faster. And lastly, using the Search box to find an e-mail address or a range of addresses will operate much faster as well.