Re: update from 2.1 to 2.4
Hi Oliver:
I've just added this page, with what I know about it (please fix it, if it doesn't work for you for any reason and know how to improve it)
http://doc.tikiwiki.org/tiki-index.php?page=Upgrade+2.x+to+2.latest
Please, help us improve the documentation as much as you can.