RPM RH9.0 conflict with unixODBC

This is what I got installing the RPM for 9.0:

file /usr/include/sqltypes.h from install of
postgresql-devel-7.4-0.3PGDG conflicts with file from package
unixODBC-devel-2.2.3-6

BTW I think that something is wrong with the file size
between two distributions:

this are the rpm for 9.0:

3768418 Nov 24 10:07 postgresql-7.4-0.3PGDG.i386.rpm
2660177 Nov 24 10:07 postgresql-contrib-7.4-0.3PGDG.i386.rpm
2030011 Nov 24 10:08 postgresql-devel-7.4-0.3PGDG.i386.rpm
1185543 Nov 24 10:07 postgresql-docs-7.4-0.3PGDG.i386.rpm
948473 Nov 24 10:07 postgresql-jdbc-7.4-0.3PGDG.i386.rpm
760377 Nov 24 10:07 postgresql-libs-7.4-0.3PGDG.i386.rpm
660158 Nov 24 10:07 postgresql-pl-7.4-0.3PGDG.i386.rpm
98019 Nov 24 10:07 postgresql-python-7.4-0.3PGDG.i386.rpm
9864477 Nov 24 10:06 postgresql-server-7.4-0.3PGDG.i386.rpm
158713 Nov 24 10:07 postgresql-tcl-7.4-0.3PGDG.i386.rpm
1053201 Nov 24 10:05 postgresql-test-7.4-0.3PGDG.i386.rpm

and this for rhas-2.1:

2080872 Nov 24 10:08 postgresql-7.4-0.3PGDG.i386.rpm
487992 Nov 24 10:08 postgresql-contrib-7.4-0.3PGDG.i386.rpm
674440 Nov 24 10:08 postgresql-devel-7.4-0.3PGDG.i386.rpm
1126355 Nov 24 10:09 postgresql-docs-7.4-0.3PGDG.i386.rpm
948208 Nov 24 10:08 postgresql-jdbc-7.4-0.3PGDG.i386.rpm
157377 Nov 24 10:08 postgresql-libs-7.4-0.3PGDG.i386.rpm
248003 Nov 24 10:08 postgresql-pl-7.4-0.3PGDG.i386.rpm
43065 Nov 24 10:08 postgresql-python-7.4-0.3PGDG.i386.rpm
3127278 Nov 24 10:08 postgresql-server-7.4-0.3PGDG.i386.rpm
28270 Nov 24 10:09 postgresql-tcl-7.4-0.3PGDG.i386.rpm
1048176 Nov 24 10:09 postgresql-test-7.4-0.3PGDG.i386.rpm

how you can see the sizes are completely different.
Am I missing something ?

Regards
Gaetano Mendola