I see this warning in PHPMyAdmin 4.0.5 \"does not contain a unique column. Grid edit, checkbox, Edit, Copy and Delete features are not available.\" In PHPMyAdmin 3.5.1 these
You should be able to assign a primary key to the table. Just click on the 'Structure' tab when viewing the table you are trying to edit, choose a field you want to be the primary key and there is a button to assign it as the primary key in one of the columns. Go back to the browse tab and you should now be able to edit the table.