mxcl/homebrew — pull request #20406 by samueljohn (2013-06-11 09:42:38+00:00)
Title: libxml2: Added --HEAD and fixed Python bindings

- Python 2.7+ is needed for current version. A fix to
build with Python 2.6 has been recently added to
the master:
https://git.gnome.org/browse/libxml2/commit/?id=722923bc9b788f028e4221c77138fc66735a3113

- So for system python on 10.6, you'll have to use
the --HEAD for now.