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
}
    };
    /**
     * Creates a new filters dialog.
     */
    DialogMarkerFilter(Shell parentShell, MarkerFilter filter) {
        super(parentShell);
        this.filter = filter;
    }
    /* (non-Javadoc)
     * Method declared on Dialog.
     */
    protected void buttonPressed(int buttonId) {
        if (buttonId == RESET_ID) {
            resetPressed();
            markDirty();
        } else if (buttonId == SELECT_WORKING_SET_ID) {
            workingSetGroup.selectPressed();
        } else if (buttonId == SELECT_ALL_ID) {
            typesViewer.setAllChecked(true);
        } else if (buttonId == DESELECT_ALL_ID) {
            typesViewer.setAllChecked(false);
        } else {
            super.buttonPressed(buttonId);
        }
    }
    /**
     * This method is called when a button is checked or unchecked. It updates the enablement
     * state of all widgets and marks the dialog as dirty.
     */