Hm, not just that, but it can't read also from "/lib/":
···
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$ python
Python 2.6.8 (unknown, Jun 9 2012, 11:30:32)
[GCC 4.5.3] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
import wx
wx.Image.CanRead('/usr/lib/python2.6/site-packages/matplotlib/mpl-data/images/filesave.png')
True
wximg = wx.Image('/usr/lib/python2.6/site-packages/matplotlib/mpl-data/images/filesave.png', wx.BITMAP_TYPE_ANY)
16:31:33: Error: Can't load image from file '/usr/lib/python2.6/site-packages/matplotlib/mpl-data/images/filesave.png': file does not exist.
wximg = wx.Image('/lib/python2.6/site-packages/matplotlib/mpl-data/images/filesave.png', wx.BITMAP_TYPE_ANY)