Apparently with pidgin:
make_instance[<class 'xpra.client.gtk_base.statusicon_tray.GTKStatusIconTray'>, None, 'Pidgin', None, \ <function tray_geometry at 0xbd1aa30>, <function tray_click at 0xbd1a9b0>, \ <function tray_mouseover at 0xbd1a9f0>, <function tray_exit at 0xbd1aa70>] \ failed to instantiate <class 'xpra.client.gtk_base.statusicon_tray.GTKStatusIconTray'> Traceback (most recent call last): File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/ui_client_base.py", line 530, in make_instance File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/gtk_base/statusicon_tray.py", line 38, in __init__ File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/tray_base.py", line 104, in set_icon_from_file File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/gtk_base/statusicon_tray.py", line 117, in do_set_icon_from_file File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/gtk_base/statusicon_tray.py", line 123, in set_icon_from_pixbuf File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/gtk_base/statusicon_tray.py", line 91, in get_geometry File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/gtk_base/statusicon_tray.py", line 46, in may_guess File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/tray_base.py", line 148, in recalculate_geometry File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/ui_client_base.py", line 597, in tray_geometry AttributeError: 'NoneType' object has no attribute 'get_geometry' Traceback (most recent call last): File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/ui_client_base.py", line 1756, in _process_new_tray File "/Users/MacAdmin/gtk/inst/lib/python2.7/site-packages/xpra/client/ui_client_base.py", line 605, in setup_system_tray AssertionError: could not instantiate a system tray for tray id 4
This code is old, I believe it is the newer GTK builds we now use that must have caused this bug to surface.
r7414 fixes that, r7415 for v0.14.x branch - closing.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/656