diff -u orage-4.4.1.orig/src/ical-code.c orage-4.4.1/src/ical-code.c
--- orage-4.4.1.orig/src/ical-code.c	2007-04-06 22:19:22.000000000 +0200
+++ orage-4.4.1/src/ical-code.c	2007-08-04 12:19:17.135791938 +0200
@@ -1290,6 +1290,7 @@
            , icalproperty_new_categories("ORAGENOTE")
            , icalproperty_new_class(ICAL_CLASS_PUBLIC)
            , icalproperty_new_dtstamp(dtstamp)
+           , icalproperty_new_lastmodified(dtstamp)
            , icalproperty_new_created(create_time)
            , NULL);