$ lightningbeam <svlgui.Lightningbeam object at 0x5d56f0> <svlgui.Lightningbeam object at 0x5d56f0> Traceback (most recent call last): File "/usr/share/lightningbeam/lightningbeam.py", line 327, in <module> MainWindow = lightningbeam_windows.MainWindowOSX() File "/usr/share/lightningbeam/lightningbeam_windows.py", line 246, in __init__ i.setvisible(False) File "/usr/share/lightningbeam/svlgui.py", line 719, in setvisible self.frame._gtk_inner_widget.set_visible(False) AttributeError: 'gtk.Fixed' object has no attribute 'set_visible'