[Zope] Zope2.7 on Debian install problem

[David Cake]

	Having a problem with upgrading Zope2.7 on Debian - when I 
run apt-get I keep getting
Setting up zope2.7 (2.7.2-0-4) ...
Traceback (most recent call last):
   File "/usr/lib/zope2.7/debian/fhs.py", line 31, in ?
     os.symlink(J((shared , a) ),J((debian , libd , a) ))
OSError: [Errno 17] File exists
dpkg: error processing zope2.7 (--configure):
  subprocess post-installation script returned error exit status 1
Errors were encountered while processing:
  zope2.7
E: Sub-process /usr/bin/dpkg returned an error code (1)
	Any suggestions?
	Is there a  more specific place for asking zope/debian 
specific questions?
	Cheers
		David