--- vendor/plugins/redmine_schedules/app/controllers/schedules_controller.rb.20090408	2009-04-08 11:07:31.000000000 +0400
+++ vendor/plugins/redmine_schedules/app/controllers/schedules_controller.rb	2009-04-09 00:00:03.000000000 +0400
@@ -472,7 +472,7 @@
 							 	available_hours -= new_entry.hours
 							
 								restrictions = "date = '#{date}' AND user_id = #{user.id}"
-								available_hours -= ScheduleEntry.sum(:hours, :conditions => restrictions + " AND id <> #{old_entry.id}") if available_hours >= 0
+								available_hours -= ScheduleEntry.sum(:hours, :conditions => old_entry.nil? ? restrictions : restrictions + " AND id <> #{old_entry.id}") if available_hours >= 0
 								
 								closed_entry = ScheduleClosedEntry.find(:first, :conditions => restrictions) if available_hours >= 0
 								closed_hours = closed_entry.nil? ? 0 : closed_entry.hours