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
tc.setText(Messages.getString("filtersDialog.type.columnHeader")); 
        tableLayout.addColumnData(new ColumnPixelData(224, true));
        tc = new TableColumn(table, SWT.NONE, 1);
        tc.setText(Messages.getString("filtersDialog.superTypecolumnHeader")); 
        typesViewer = new CheckboxTableViewer(table);
        GridData gridData = new GridData(GridData.FILL_HORIZONTAL);
        gridData.heightHint = 105;
        gridData.widthHint = 350;
        typesViewer.getTable().setFont(font);
        typesViewer.getControl().setLayoutData(gridData);
        typesViewer.setContentProvider(getContentProvider());
        typesViewer.setLabelProvider(getLabelProvider());
        typesViewer.setSorter(getSorter());
        typesViewer.addCheckStateListener(checkStateListener);
        typesViewer.setInput(filter.getRootTypes().toArray());
        Composite buttonComposite = new Composite(composite, SWT.NONE);
        GridLayout buttonLayout = new GridLayout();
        buttonLayout.marginWidth = 0;
        buttonComposite.setLayout(buttonLayout);
        selectAllButton = createButton(buttonComposite, SELECT_ALL_ID, Messages
                .getString("filtersDialog.selectAll"),  
                false);
        deselectAllButton = createButton(buttonComposite, DESELECT_ALL_ID,
                Messages.getString("filtersDialog.deselectAll"),  
                false);
    }
    private IStructuredContentProvider getContentProvider() {
        return new IStructuredContentProvider() {
            public Object[] getElements(Object inputElement) {
                List roots = filter.getRootTypes();