Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/screenlets/__init__.py", line 1460, in expose
    self.on_draw(ctx)
  File "/usr/share/screenlets/Sysmonitor/SysmonitorScreenlet.py", line 461, in on_draw
    self.theme.draw_text(ctx,a[0]+  ' ' + a[4], 0, m, self.font, self.fontsize,  self.width,pango.ALIGN_CENTER)
TypeError: 'NoneType' object is unsubscriptable