Hi, I'm new to mpl and want to learn date plotting.  Would like to start with the demo, but date_demo1 won't run for me. (My specs:  winXP, Python 2.5, matplotlib 0.9.0, numpy 1.0, and yes was connected to the internet when I ran it).  I just copied into IDLE and saved it and got this error:

Traceback (most recent call last):
  File "C:/Documents and Settings/user/Desktop/datedemo.py", line 22, in <module>
    quotes = quotes_historical_yahoo('INTC', date1, date2)
  File "C:\Python25\lib\site-packages\matplotlib\finance.py", line 153, in quotes_historical_yahoo
    try: ret = parse_yahoo_historical(fh, asobject, adjusted)
  File "C:\Python25\lib\site-packages\matplotlib\finance.py", line 53, in parse_yahoo_historical
    dt = datetime.date(*time.strptime(datestr, '%d-%b-%y')[:3])
  File "C:\Python25\lib\_strptime.py", line 310, in strptime
    (data_string, format))
ValueError: time data did not match format:  data=2003-12-01  fmt=%d-%b-%y

Any idea what I'm doing wrong?