sorry for the -- but it's my opinion that if you know that
a question has been asked before then it is more polite to
either search for that question yourself or ask for help finding
the link to that question in the chatterbox

maybe it was wrong of me to do it, but that's the reasoning for it
if you disagree you can -- me back :) Update:

on the other hand a 'thank you' post is perfectly acceptable!! (++ ;)