mozilla-firefox/testing + calendar = calendar is blank after first load

[hanasaki <hanasaki@hanaden.com>]

Running:
	mozilla-firefox/testing + calendar

The calendar is the firefox linux download from
http://www.mozilla.org/projects/calendar/download.html

Install the calendar
quit firefox
run firefox
open calendar - entries show ok
quit firefox
run firefox
open calendar - all entries are blank

uninstalling/reinstalling the calendar allows the calendar to be viewed 
just once, again.