Description of problem:
Due to the vagaries of rpmbuild's parsing of spec files, some Provides and
Obsoletes in libGLw are ending up in the description field.  Here's a snippet
from the spec file::

'''
BuildRequires: lesstif-devel

%description
Mesa libGLw runtime library

Provides: libGLw
# libGLw used to be in Mesa package in RHL 6.x, 7.[0-2], RHEL 2.1
Obsoletes: Mesa
# libGLw moved to XFree86-libs for RHL 7.3, 8, 9, FC1, RHEL 3
Obsoletes: XFree86-libs
# libGLw moved to xorg-x11-libs FC[2-4], RHEL4
Obsoletes: xorg-x11-libs
'''
The Provide and three Obsoletes are included i nthe description instead of being 
Provides and Obsoletes for the package.

Moving those lines above the %description should fix this problem.

Version-Release number of selected component (if applicable):
mesa-libGLw-6.5.1-3