Most of the manual pages contained in the two packages blas-man-3.0-4 and lapack-man-3.0-4, and installed in /usr/man/manl/ contain non-ASCII characters which propagate in the whatis index. The apropos and wahtis commands are using grep which will consider /usr/man/whatis a binary file, so no info will be given about manual pages installed in /usr/man. If the non-ASCII characters are filtered out from the manual pages, everything behaves as expected.
This is fixed in Red Hat Linux 7.