[14:07:49] (ALERT) EXCEPTION !!
Traceback (most recent call last):
  File "/export/home/gozer/gozerbot/gozerbot/thr.py", line 51, in run
    threading.Thread.run(self)
  File "/usr/local/lib/python2.4/threading.py", line 422, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/export/home/gozer/gozerbot/gozerbot/periodical.py", line 140, in runjob
    if not job.check():
  File "/export/home/gozer/gozerbot/gozerbot/periodical.py", line 110, in check
    self.func(*self.args, **self.kw)
  File "/export/home/gozer/gozerbot/myplugs/rrd.py", line 138, in create_graphs
    self.fill_graph(name, size)
  File "/export/home/gozer/gozerbot/myplugs/rrd.py", line 161, in fill_graph
    rrdtool.update(fname, 'N:%s' % (v,))
TypeError: argument 0 must be string