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
messageBox.setMessage(Messages
                    .getString("filtersDialog.messageMarkerLimitInvalid")); 
            messageBox.open();
            if (markerLimit.forceFocus()) {
                markerLimit.setSelection(0, markerLimit.getCharCount());
                markerLimit.showSelection();
            }
        }
    }
    /**
     * Handles a press of the Reset button.
     * Updates the UI state to correspond to a reset filter,
     * but doesn't actually reset our filter.
     */
    protected void resetPressed() {
        filterEnabledButton
                .setSelection(MarkerFilter.DEFAULT_ACTIVATION_STATUS);
        filterOnMarkerLimit
                .setSelection(MarkerFilter.DEFAULT_FILTER_ON_MARKER_LIMIT);
        markerLimit.setText(String.valueOf(MarkerFilter.DEFAULT_MARKER_LIMIT));
        typesViewer.setAllChecked(true);
        int onResource = MarkerFilter.DEFAULT_ON_RESOURCE;
        anyResourceButton
                .setSelection(onResource == MarkerFilter.ON_ANY_RESOURCE);
        anyResourceInSameProjectButton
                .setSelection(onResource == MarkerFilter.ON_ANY_RESOURCE_OF_SAME_PROJECT);
        selectedResourceButton
                .setSelection(onResource == MarkerFilter.ON_SELECTED_RESOURCE_ONLY);
        selectedResourceAndChildrenButton
                .setSelection(onResource == MarkerFilter.ON_SELECTED_RESOURCE_AND_CHILDREN);