As reported in ​https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=772390

checkbashisms (from the 'devscripts' package) found the following:

possible bashism in ./usr/lib/winswitch/bin-override/xdg-open line 28
(should be 'b = a'):
		  if [ $e == 0 ]; then

Not using bash (or a Debian Policy compliant shell interpreter that doesn't provide such an extra feature) as /bin/sh is likely to lead to errors or unexpected behaviours. Please be aware that dash is the default /bin/sh in Debian.

Hints about how to fix bashisms can be found at: ​https://wiki.ubuntu.com/DashAsBinSh

This warning message has been appearing on startup since 0.10.10.

xpra-0.8.0-9.fc18.x86_64
winswitch-0.12.18-2.x86_64

applet.py:751:do_stop_server:AttributeError: ServerLineConnection instance has no attribute 'stop_server'

Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/winswitch/ui/dialog_util.py", line 119, in <lambda>
    dialog.connect('response', lambda dialog, response_id: ask_response_callback(dialog, response_id))
  File "/usr/lib/python2.7/site-packages/winswitch/ui/dialog_util.py", line 105, in ask_response_callback
    ok_callback()
  File "/usr/lib/python2.7/site-packages/winswitch/client/applet.py", line 746, in <lambda>
    None, lambda: self.do_stop_server(server))
  File "/usr/lib/python2.7/site-packages/winswitch/client/applet.py", line 751, in do_stop_server
    client.stop_server("User request")
AttributeError: ServerLineConnection instance has no attribute 'stop_server'

Local variables in innermost frame:
self: <winswitch.client.applet.WinSwitchApplet instance at 0x7ff10efdda70>
client: <winswitch.client.server_line_connection.ServerLineConnection instance at 0x25e1950>
server: <winswitch.objects.server_config.ServerConfig instance at 0x25eb638>