Bug 69424 TVT3.0: Multiple Mnemonics in Tasks -> Filters
From the main Workbench view, click the Task menu (drop down arrow) and select Filters. There are duplicated mnemonics for (D). See the attached screenshot.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/DialogMarkerFilter.java
Font font = parent.getFont();
        Composite composite = new Composite(parent, SWT.NONE);
        composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        composite.setFont(font);
        composite.setLayout(new GridLayout());
        filterEnabledButton = createCheckbox(composite, Messages
                .getString("filtersDialog.onOff"), 
                false);
        filterEnabledButton.setFont(composite.getFont());
        filterEnabledButton.setLayoutData(new GridData());
        filterEnabledButton.addSelectionListener(selectionListener);
    }
    /**
     * Creates the area where the user can specify a maximum number of items
     * to display in the table.
     * 
     * @param parent the parent composite
     */
    protected void createMarkerLimitArea(Composite parent) {
        Font font = parent.getFont();
        Composite composite = new Composite(parent, SWT.NONE);
        composite.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        composite.setFont(font);
        GridLayout layout = new GridLayout();
        layout.numColumns = 2;
        composite.setLayout(layout);
        filterOnMarkerLimit = createCheckbox(composite, Messages
                .getString("filtersDialog.limitVisibleMarkersTo"), 
                false);
        filterOnMarkerLimit.setFont(composite.getFont());