  It is shown that the RR charges of Gepner models are not all accounted for by
the usual tensor product and permutation branes. In order to characterise the
missing D-branes we study the matrix factorisation approach to the description
of D-branes for Gepner models. For each of the A-type models we identify a set
of matrix factorisations whose charges generate the full lattice of quantised
charges. The additional factorisations that are required correspond to
generalised permutation branes.
