I idle in some skype group chats. after setting up the N900 with skype it joined my group chats and everytime someone writes sth in the chat it notifies me like any other IM. the only option is to leave the chat permanently. there should be a different handling of group chats then normal conversations. sth like "ignore group chat".

Or better yet, put them in a queue for later reading, just like an email list.

you can suggest this solution here if you like and vote for the brainstorm too:
http://maemo.org/community/brainstor...conversations/

as there is an item for the group chat in conversation, you can always open the group and read what happened since your last look.