The issue is old now, I have ignored it for about a month of pacman -Syu but in updating to KDE 4.7 tonight I hit it again.
If you pacman -Syu and get
error: failed to commit transaction (conflicting files)
python2-zope-interface: /usr/lib/python2.7/site-packages/zope.interface-3.6.3-py2.7.egg-info/ exists in filesystem
The you need to go to this page and follow the two simple commands.
It would appear to be a simple bug in pacmans conflict resolution handling. It had to happen sometime I guess!!