Description of problem: If you rpmbuild the subversion-1.4.2 SRPM from FC6 on a machine with apr-devel 0.9.6 (e.g.: FC4), the configure script fails. Configure is using a regular expression which is specifying 0.9.7 or better. I notice FC's apr-0.9.6 has quite a number of patches, so it may be true that FC's apr-0.9.6 is indeed sufficient.
Not yet coffee-d up enough. It's apr-UTIL with the version discrepancy.
It may well be true that FC6/devel subversion package *could* be patched and packaged to support building against the the FC4 apr/apr-util packages; but it would add unnecessary complexity; FC6 packages should not in general be expected to build as-is on <FC6. I've fixed the deps to reflect the actual dependencies in the configure script for the next Raw Hide build; thanks for the report.