Latest version of lme4

I've been unable to install the latest version of Matrix (0.98-3), and
therefore lme4. As CRAN has no Mac binary more recent than 0.97-2, is
this an indication that such an installation will require a modest
amount of work?

The error message is:
------------------------------------------------------------------------
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trying URL 'http://cran.au.r-project.org/bin/macosx/2.1/PACKAGES'
Content type 'text/plain' length 27756 bytes
opened URL
==================================================
downloaded 27Kb

trying URL  
'http://cran.au.r-project.org/src/contrib/Matrix_0.98-3.tar.gz'
Content type 'application/octet-stream' length 626712 bytes
opened URL
==================================================
downloaded 612Kb

* Installing *source* package 'Matrix' ...
** libs
gcc-3.3 -no-cpp-precomp
-I/Library/Frameworks/R.framework/Resources/include
-I/usr/local/include  -I./Metis -fno-common  -g -O2 -c HBMM.c -o HBMM.o
In file included from HBMM.c:2:
iohb.h:6:19: malloc.h: No such file or directory
make:
The downloaded packages are in
/private/tmp/RtmpnCA6Nu/downloaded_packages
** Removing  
'/Library/Frameworks/R.framework/Versions/2.1.1/Resources/library/
Matrix'
** Restoring previous
'/Library/Frameworks/R.framework/Versions/2.1.1/Resources/library/
Matrix'
*** [HBMM.o] Error 1
ERROR: compilation failed for package 'Matrix'
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I am still using 10.3.9; will upgrade in a few days.

John Maindonald             email: john.maindonald at anu.edu.au
phone : +61 2 (6125)3473    fax  : +61 2(6125)5549
Centre for Bioinformation Science, Room 1194,
John Dedman Mathematical Sciences Building (Building 27)
Australian National University, Canberra ACT 0200.