Version:           1.5.5 (using KDE KDE 3.5.5)
Installed from:    Gentoo Packages
Compiler:          gcc 4.1.1 
OS:                Linux

With Job parent class and multiple child classes, the JobExplore child class was listed as implemented by the parent.  When regenerating code, the number of times JobExplore was listed increased.

class Job : public JobExplore, public JobExplore, public JobExplore, public JobExplore
{
public:
...

The Class diagram shows associations in correct direction.  The properties for Job class shows associations as expected. Properties for JobExplore shows reference to Job as expected.

JobExplore class has multiple references to Job also.

class JobExplore : public Job, public Job, public Job, public Job
{
public:
...

The xmi file had following against Job section:
       <UML:GeneralizableElement.generalization>
        <UML:Generalization xmi.idref="499043" />
        <UML:Generalization xmi.idref="499043" />
       </UML:GeneralizableElement.generalization>