All is well generally after my upgrade from Mountain Lion to Mavericks, but I seem to have encountered a wee problem with the activation keys I want to use when activating the visor. I used to have Shift-~ (Shift-Tilda) set, but this combination seems to be prohibited now (I get a system beep when attempting to set them up). I can use Control-~ instead, but it isn’t my preference. Is this a bug, of am I missing something? Any help would be greatly appreciated.