When I run 'yum search postgres' the output that is related to libgda-postgres
is the following:
libgda-postgres.i386                     1:1.9.100-4.fc5        extras
Matched from:
libgda-postgres
libgda PostgreSQL Provider
This package includes the libgda PostgreSQL provider.
Obsoletes:      gda-postgres < 1:1.9.100-4.fc5
Provides:       gda-postgres = 1:1.9.100-4.fc5

I can't imagine that the 'obsoletes' and 'provides' should be part of the
description.  I haven't actually looked at the spec, but those lines might have
to move so that they are actually used and not just listed in the description.