One more note about cmake 2.6.4:
Compilation is now done in the binary directory corresponding to the directory of the source file rather than the top level directory. As a result, any secondary files generated (e.g. Fortran .mod files) now end up in different locations.
The only EPEL package this affects that I know of is plplot. I doubt that many people were making use of the cmake and fortran 95 in EL5, so I don't think this is a blocker.
epel-devel@lists.fedoraproject.org