Lightning has gotten screwed up on my system. It shows the list of calendars on the left, but the calendar page itself is blank. It doesn't even shade the weekends. I cannot do anything (even change the view). The task list does the same thing. I have tried to remove and re-install Lightning. I have also removed lightning, removed the files in the calendar-data directory, deleted all "calendar" entries from prefs.js, and reinstalled Lightning. The problem remains. Lightning will work if I create a new profile, but I don't want to have to recreate my email setup just to get the calendar back. Am I missing something that I need to do in order to clear out all of the old Lightning data and install it as if it was a new install?