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
workingSetGroup.setSelection(onResource == MarkerFilter.ON_WORKING_SET);
        updateEnabledState();
    }
    /**
     * Sets the selected marker types.
     *
     * @param markerTypes
     */
    void setSelectedTypes(List markerTypes) {
        typesViewer.setCheckedElements(new Object[0]);
        for (int i = 0; i < markerTypes.size(); i++) {
            Object obj = markerTypes.get(i);
            if (obj instanceof MarkerType) {
                typesViewer.setChecked(obj, true);
            }
        }
    }
    /**
     * Updates the enabled state of the widgetry.
     */
    protected void updateEnabledState() {
        filterOnMarkerLimit.setEnabled(isFilterEnabled());
        markerLimit.setEnabled(isFilterEnabled()
                && filterOnMarkerLimit.getSelection());
        typesViewer.getTable().setEnabled(isFilterEnabled());
        selectAllButton.setEnabled(isFilterEnabled()
                && typesViewer.getTable().getItemCount() > 0);
        deselectAllButton.setEnabled(isFilterEnabled()
                && typesViewer.getTable().getItemCount() > 0);
        anyResourceButton.setEnabled(isFilterEnabled());