I have posted this in the Yahoo Groups Help Forum and do as suggested in the answer, post it here:

(I know this may not be the most satisfying answer to your concerns, and I apologize again for that. If you'd like to provide feedback on this issue to our Product team, feel free to post about the issue in theGroups feedback forum.)

I will ask once again for help on this issue.

I am a moderator of several groups, and we use the Calendar to send reminders to the members and because we have a problem with our special norwegian letters (æ, ø, å) it is almost impossible to use it. Since these letters are a part of our language, we use them a lot. It is very disturbing to read.

It all started when you upgraded to the new Calendar, so it has been going on for a while.

When looking at the Calendar function in the webpage – (I have tried Safari, Firefox and Google Chrome) - the Calendar shows exactly how it should.

When looking at the reminder sent to messages in the yahoo group webpage - it looks like this: «gj�re dette pï¿» - should be: «gjøre dette på»

And when I receive mails from the Calendar to my inbox it looks like this: «? gj?re» - should be: «å gjøre»  (through my Mail-client)

I have asked the other members, and it is exactly the same to all.

I have tried to change the coding to Unicode as you suggested before, but that didn´t seem to help - nothing changed in the web or in my mail.

After asking for help in another Forum, one of the member there explained me the following:

"I just reproduced the symptom in my test group. The three characters you cite (æ, å, ø) are encoded as UTF-8 and displayed correctly in the description of the calendar entry itself. ??But in the reminder email all three are translated to the three-byte sequence 0xEF BF BD, which encodes the code point U+FFFD, which is the "replacement character"

This looks like a problem only Yahoo can fix -- there's some kind of error in the code that creates the reminder message body, causing it to fail when presented with these characters.??There is one niggle of mystery in my experiment that I haven't understood yet. I created the Description of the test event by copy/paste from your message -- in my email client Eudora Classic. Now that client does not support UTF-8, and those characters were each represented by a single byte: 0xE6, 0xF8 and 0xE5 respectively. But after pasting them into the Event, examining the source of the page showed that they were now encoded in UTF-8 form, as the two-byte sequences 0xC3 A6, 0xC3 B8 and 0xC3 A5 respectively. How that translation was accomplished mystifies me, but is probably less important than whatever mistake happened when the description text was placed into the body of the reminder message.??"

Hope you are able to help with this issue. I guess we are not the only one with this problem using Yahoo-group.