Bug 134266 [Wizard] Page description not set if page message already set
Since page messages such as errors and warnings used to be displayed in the same widget as the page description, code was put in place in WizardDialog#updateDescriptionMessage() to avoid setting the page description if there was already a message. As of 3.2 M6 there is a separate widget for displaying error and warning messages and so the page description should always be set.
bundles/org.eclipse.jface/src/org/eclipse/jface/wizard/WizardDialog.java
}
    /**
     * The Next button has been pressed.
     */
    protected void nextPressed() {
        IWizardPage page = currentPage.getNextPage();
        if (page == null) {
            
            return;
        }
        
        showPage(page);
    }
    /**
     * Checks whether it is alright to close this wizard dialog
     * and performed standard cancel processing. If there is a
     * long running operation in progress, this method posts an
     * alert message saying that the wizard cannot be closed.
     * 
     * @return <code>true</code> if it is alright to close this dialog, and
     *  <code>false</code> if it is not
     */
    private boolean okToClose() {
        if (activeRunningOperations > 0) {
            synchronized (this) {
                windowClosingDialog = createWizardClosingDialog();
            }
            windowClosingDialog.open();
            synchronized (this) {
                windowClosingDialog = null;