wx.TextCtrl.SetDefaultStyle not working?

[bcwhite at pobox.com]

I'm running Python2.5 with wxPython v2.8.3.0 under WinXP and I cannot
get the SetDefaultStyle method to work.

I'm trying:

        self.output.SetDefaultStyle(wx.TextAttr(wx.RED))
        self.output.AppendText(text)
        self.output.SetDefaultStyle(wx.TextAttr())

where "self.output" is a TextCtrl window.  The text appears, but it's
always black.  If I print the output of
self.output.GetDefaultStyle().GetTextColour() before resetting it back
to default, I see "(255, 0, 0, 255)".  After reset, it's "(-1, -1, -1,
255)".

The font in that window is the system default.

Am I doing something wrong?

-- Brian