Aufbau irregularities

[Allen Adler <adler;at;hera.wku.edu>]

 As one progresses through the elements by atomic number, the
 pattern by which the electronic shells get filled is fairly
 regular, but there are a few elements displaying irregularities,
 e.g. those marked by an asterisk in the table on p.B-1 of my issue
 of the CRC Handbook of Chemistry and Physics.
 I imagine that these irregularities have been the object of a lot of
 study, particularly in computational chemistry. So what I would like to
 know is:
 (1) have these irregularities been independently confirmed by
     ab initio computations?
 (2) Apart from a brute force computation, have heuristic reasons been
     given why the Schrodinger (or whatever) equation should give rise
     to these anomalies?
 (3) I know that different isotopes of an element are supposed to have
     the same chemical properties; but the atomic mass does appear in
     the Schrodinger equation, so it is conveivable that by choosing a
     suitable isotope for each element, one can obtain a table of electronic
     configurations in which no irregularities appear. Has this been observed
     or calculated?
 (4) Assuming the premise of (3) is correct, is there a table of the
     electronic configurations of all of the isotopes?
 Naively,
 Allan Adler
 adler;at;hera.wku.edu