I have 13.04 64 bit Ubuntu installed and I'm using Unity Tweak tool to enable hot corners everything works as it should as long as I don't reboot as soon as I do hotcorners stops working. In order to get them functioning again I have to open the tweak tool and turn hotcorners off and then back on after every reboot. This I admit isn't a huge issue but is annoying is there anyway to get hotcorners to work properly after reboot with out having to reset them every time?