bar graph and legend

Dear all,
I am an unexperienced matplotlib user, and I have a couple of questions about adding a legend to a graph.

In this example, on my PC both the entries in the legend appear in blue color:
#!/usr/bin/env python
import numarray as na
from pylab import *

labels = ["A", "B", "C"]
first = [ 1, 2, 3 ]
second = [ 3, 2, 1 ]

xlocations = na.array(range(len(labels)))+0.33
width = 0.33
bar1=bar(xlocations, first, width=width, color='blue')
bar2=bar(xlocations+.33, second, width=width, color='red')

legend((bar1,bar2), ('First','Second'))

Did I make some mistake?

Moreover, if I add a legend to a graph plotting a set with marks and without lines, the legend will show two points instead of one (which would have been the expected behaviour). Is this correct?

Thank in advance,