Got that one? Ha! Me too 
Well apparently, Rails 2.1 doesn’t have TimeZone.adjust anymore, which is being called by vendor/plugins/exception_notification/views/exception_notifier/_timestamp.rhtml. All you have to do is replace those two lines:
time_zone = TimeZone.new(”Eastern Time (US & Canada)”)
timestamp = time_zone.adjust(Time.now)
and replace them with:
time_zone = ActiveSupport::TimeZone.new(”Eastern Time (US & Canada)”)
timestamp = Time.now.in_time_zone(time_zone)
A diff file is attached. Happy updating!