That little white square means you installed something that is breaking the home tab and/or the "AllTabsBG" mod. Uninstall whatever you installed and you should be set. Oh, and pretty much all the functionality of 'clocks and alarms' can be reached by just tapping the world clock on the home tab of manila anyway. However if you REALLY want to you can enable 'windows default' instead of manila to reach the 'clocks and alarms'.