Problem while viewing a manpage

I searched in the Man viewer for 'pwd' and then double-clicked on the first item found but the following error occurred :

  File pida/services/man.py, line 91, in cb_list_d_clicked
    short_title='Man %s(%d)' %
  File pida/core/boss.py, line 79, in call_command
    return group.call(commandname=commandname, **kw)
  File pida/core/service.py, line 150, in call
    result = self.__call_command(command, **kw)
  File pida/core/service.py, line 158, in __call_command
    return command(**kw)
  File pida/core/command.py, line 72, in __call__
    return self.__callback(**kw)
  File pida/services/terminal.py, line 181, in cmd_execute
    short_title=short_title,
  File pida/core/views.py, line 20, in create_view
    prefix=viewname, **kw)
  File pida/pidagtk/contentview.py, line 89, in __init__
    self.init(**kw)
  File pida/services/terminal.py, line 56, in init
    terminal.execute(command_args, **kw)
  File pida/services/terminal.py, line 465, in execute
    del kw['lang']
KeyError: 'lang'

PS: this error has been reported through the automated procedure which seems to work well :)

PPS: I run pida-0.4.3.