Yes, Rainlendar reads the modified ics file and notices that the alarm has been already dismissed. I can make the support for Mozilla alarms optional but then you'll always have dismiss the alarms in Rainlendar even if they were already done so in Sunbird. The other option is to disable the automatic monitoring of the ics file. I'm not sure if there is anything else I can do about this problem.
ok, thanks, i see.
rereading the ics files is mandatory for me, so disableling does not work for me.
i recommend to let the decisions up to the user (a good default assumed).
in the advanced options let him/her choose, what he/she wants.
dismissing every alarm in rainlendar, which was dismissed in sunbird before is a little bit of annoying maybe, but it will definitely *remind* the user
now, that i know about how rainlendar works with this issue, i will learn to work with it
so thank you for implementing that feature so fast!!