Great news: with
Leopard, there is no need for iCalFix anymore!
Bad news: iCalFix is not compatible with the new version of iCal and the latter keeps complaining about the former.
A lot of people have asked the author -BTW: thanks again, Robert, for creating iCalFix when it was needed- how to remove iCalFix but never got a reply.
Here is a veeery simple fix:
Simply remove the input manager from /Library/InputManagers
Using the shell:
sudo rm -rf /Library/InputManagers/iCalFix