Thanks for your bugreport.
I just looked into this and it appears that the problem is that update-manager uses the "set_cell_data_func()" call for the toggle button instead of providing a "TreeViewColumn(cr, active=COLUMN_NR)".
Thanks for your bugreport.
I just looked into this and it appears that the problem is that update-manager uses the "set_cell_ data_func( )" call for the toggle button instead of providing a "TreeViewColumn(cr, active=COLUMN_NR)".