Problem installing libxft-dev from Sarge

["Martin D. Weinberg" <weinberg@astro.umass.edu>]

I get:

dpkg -i /data/weinberg/libxft-dev_2.1.2-6_i386.deb
(Reading database ... 148677 files and directories currently installed.)
Preparing to replace libxft-dev 2.1.2-5 (using .../libxft-dev_2.1.2-6_i386.deb) ...
diversion of /usr/X11R6/include/X11/Xft/Xft.h to /usr/X11R6/include/X11/Xft/Xft1.h by libxft-dev
Removing `diversion of /usr/X11R6/include/X11/Xft/Xft.h to /usr/X11R6/include/X11/Xft/Xft1.h by libxft-dev'
dpkg-divert: rename involves overwriting `/usr/X11R6/include/X11/Xft/Xft.h' with  different file `/usr/X11R6/include/X11/Xft/Xft1.h', not allowed
dpkg: error processing /data/weinberg/libxft-dev_2.1.2-6_i386.deb (--install):
 subprocess pre-installation script returned error exit status 2
Errors were encountered while processing:
 /data/weinberg/libxft-dev_2.1.2-6_i386.deb


Does anybody know how to fix this?

TIA!