Sorry for not replying before on the list (just realized that you had replied), the above fix works for me - thanks!

Still getting the same error on Mac OSX 10.7 and XCode 4.3

Python 2.7.3 (default, May 19 2012, 14:23:28)
[GCC 4.2.1 Compatible Apple Clang 3.1 (tags/Apple/clang-318.0.58)] on darwin
Type "help", "copyright", "credits" or "license" for more information.

...
XX/cxxextensions.c -o build/temp.macosx-10.4-x86_64-2.7/CXX/cxxextensions.o
/usr/bin/clang -fno-strict-aliasing -Os -w -pipe -march=native -Qunused-arguments -fwrapv -DNDEBUG -g -fwrapv -O3 -Wall -DPY_ARRAY_UNIQUE_SYMBOL=MPL_ARRAY_API -DPYCXX_ISO_CPP_LIB=1 -I/usr/local/Cellar/python/2.7.3/lib/python2.7/site-packages/numpy/core/include -I. -I/usr/local/Cellar/python/2.7.3/lib/python2.7/site-packages/numpy/core/include -Isrc -Iagg24/include -I. -I/usr/local/Cellar/python/2.7.3/lib/python2.7/site-packages/numpy/core/include -I/usr/X11/include/freetype2 -I/usr/X11/include -I. -I/usr/local/Cellar/python/2.7.3/include/python2.7 -c src/backend_agg.cpp -o build/temp.macosx-10.4-x86_64-2.7/src/backend_agg.o
In file included from src/backend_agg.cpp:11:
In file included from src/_backend_agg.h:34:
agg24/include/agg_renderer_outline_aa.h:1368:45: error: binding of reference to type
'agg::line_profile_aa' to a value of type 'const agg::line_profile_aa' drops qualifiers
line_profile_aa& profile() { return *m_profile; }
^~~~~~~~~~
1 error generated.
error: command '/usr/bin/clang' failed with exit status 1

Added the const and it works now...it's not modified in the pip or easyinstall....please update that, thanks !