upgrade libxml2 warning

[7stud]

Hi,

I get this warning when I use nokogiri on mac osx 10.4.11:

-----
HI. You're using libxml2 version 2.6.16 which is over 4 years old and
has
plenty of bugs. We suggest that for maximum HTML/XML parsing
pleasure, you
upgrade your version of libxml2 and re-install nokogiri. If you like
using
libxml2 version 2.6.16, but don't like this warning, please define the
constant
I_KNOW_I_AM_USING_AN_OLD_AND_BUGGY_VERSION_OF_LIBXML2 before requring
nokogiri.
----

As a result, I would like to upgrade libxml2. I recently installed a
python module that required the latest libxml2 and libxslt, which it
downloaded and installed(now I have libxml2(version 2.7.6) and libxslt
(version 1.1.26). Can I just link to those installs somehow? I set
an environment variable like this:

DYLD_LIBRARY_PATH=/path/to/dir/with/libxml2

and tried reinstalling nokogiri:

$ sudo gem install nokogiri

but I still get the same warning.

I also notice that the nokogiri website says the pre-requisites
include libxml2-dev and libxslt-dev, which I know nothing about. Is
there a straightforward way to upgrade everything without resorting to
Fink or Macports? I've never used those programs before because
everything I've tried to install is pretty easy.

Thanks.