[Zope] Zope & PIL: ImageFile name conflict

Using PIL 1.1.2 from within Zope 2.4.2 (python 2.1): the following call works from the command line but fails for me within Zope, font = ImageFont.load('/usr/lib/python2.1/site-packages/PIL/Images/base_pil/300/Verdana_10_300.pil') The open method in PIL's Image.py tries to open an image file (the corresponding Verdana_10_300.pbm file). It attempts to create an ImageFile object, which it should be importing from PIL/ImageFile.py but instead is getting App/ImageFile.py from Zope. How can I resolve this naming conflict?