i had this happen too, all the icons were crunched up over eachother in top left screen, over the menu bar and it crashed completely. couldnt use keyboard and after about a minute it would restart. only way to stop it restarting was to quickly jam it into usb mode and it would crash the kill/shutdown/restart function. if i had of had quicklaunch installed at the time i could have solved it easily by loading a terminal from there or remove the app completely.

i tried many resolutions like putting it into usb mode to access it but that failed. after a day or so of trying everything i had at my disposal i just reflashed. as all the apps were still there i didnt actually lose any data, but did have to reinstall all the apps which their configurations remained too, thankfully. i deleted the config for theme customizer and then reinstalled that fine.

this application needs some serious warnings about changing settings on it. changing some things can really mess up your phone.