Add Members to Group - different behaviour for Basic/Advanced search.

1 - Manage Groups (left navbar - CiviCRM)
http://210.211.151.22/drupal/civicrm/group?reset=1

2 - Click on link at bottom "» New Group"

takes you to page "Create New Group"
http://210.211.151.22/drupal/civicrm/group/add?reset=1

3 - Enter name "g1"
click on button "Continue"

screen shows Add Members: g1 with the basic search criteria.
http://210.211.151.22/drupal/civicrm/group/add?_qf_Search_display=true

click "search" button

4 - screen shows "Add Members: g1"
with the button "Add Contacts to g1".

5 - Same as step 1.

6 - Same as step 2.

7 - Same as step 3 (change name to "g2").

8 - click on link "Advanced Search" (below the "Search" button)
http://210.211.151.22/drupal/civicrm/contact/search/advanced
screen shows advanced search criteria.

click on any of the "Search" buttons.

Screen shows search results but no button "Add Contacts to g2"
Instead it shows the standard "Action" select and "Go" button.