User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:220.127.116.11) Gecko/20060830 SeaMonkey/1.0.4 Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:18.104.22.168) Gecko/20060830 SeaMonkey/1.0.4 I have tested the problem with SeaMonkey 1.0.4 Mozilla Calendar 2004110405-cal (http://sisyphus.ru/srpm/seamonkey/get). The problem does not exist in "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20051124 Mozilla Sunbird/0.3a1+" Reproducible: Always Steps to Reproduce: Create a new event in the past with some given year, mark as "All day", recurrence = 1 year. Actual Results: The event is not shown neither on given year, nor in current year. When no recurrence is defined, the task is displayed on the given year.
The old Calendar Extension is no longer developed and no bugs are accepted unless the problem is reproducible in recent Sunbird build: [http://ftp.mozilla.org/pub/mozilla.org/calendar/sunbird/nightly/latest-trunk/]
If it works in Sunbird, this is WFM. See comment 1 for the explanation.