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
protected List getSelectedTypes() {
        return Arrays.asList(typesViewer.getCheckedElements());
    }
    protected ViewerSorter getSorter() {
        return new ViewerSorter() {
            public int compare(Viewer viewer, Object e1, Object e2) {
                MarkerType t1 = (MarkerType) e1;
                MarkerType t2 = (MarkerType) e2;
                return collator.compare(t1.getLabel(), t2.getLabel());
            }
        };
    }
    /**
     * Updates the filter from the UI state.
     * Must be done here rather than by extending open()
     * because after super.open() is called, the widgetry is disposed.
     */
    protected void okPressed() {
        try {
            int markerLimit = Integer.parseInt(this.markerLimit.getText());
            if (markerLimit < 1) {
                throw new NumberFormatException();
            }
            updateFilterFromUI();
            super.okPressed();
        } catch (NumberFormatException eNumberFormat) {
            MessageBox messageBox = new MessageBox(getShell(), SWT.OK
                    | SWT.APPLICATION_MODAL | SWT.ICON_ERROR);
            messageBox.setText(Messages
                    .getString("filtersDialog.titleMarkerLimitInvalid"));