If a group name contains parentheses, even if we set rights for the group, the boxes don't stay checked in the admin rights page.
I set "view" and "edit" for a group called Ad-Aelia-Groupes-Fr-Neuilly-Dof (en cours)-Dof régions-Neuilly_régions_dof_aelia_ad : the boxes are checked
I leave admin
I go back to the admin rights page : the boxes are no longer checked
Also tested with a group called "Test (test)"
Found on a 1.3.2 and also tested on a 1.9 RC1