Doxygen version 1.5.1-20070315

If a class definition contains member groups, Doxygen adds the
members of those groups to the "method" compartment of a class
diagram.  The entries are marked with a '*' as access specifier.

There are two problems with this approach:
- if a member group is homogeneous (e.g., containing only public
  attributes), these members appear twice in the class diagram:
  once in the correct compartment, with a correct access specifier,
  and once with a '*' at the end of the method compartment.
- if a member group is heterogeneous (containing methods as well
  as attributes and/or spanning different access levels), all
  members (even the attributes) are only listed in the method
  compartment, marked with '*'.

On the other hand, the data structures that are involved in the
generation of the class diagrams contain all the information
that is necessary to correctly assign all kinds of member group
members to the respective compartment of the class diagram, and
to provide them even with the correct access specifier.

The attachment contains a test case that demonstrates the problem,
and a patch (relative to doxygen-1.5.1-20070315) with a possible
solution.