Beware of upgrade on phpBB3
Basically, I ran into problems of (intentionally?) forced upgrade from phpBB 3.0.0 to 3.0.2 since the old one started refusing any further posts.
Here I must also warn all of you that upgrade does not work anymore in the old fashion way (overwrite the needed *.php files and run) but it always includes modifications on the DB too. So, be careful with any hacks.
It also requires you to first pass from 3.0.0 to 3.0.1 and then from 3.0.1. to 3.0.2. The tricky part for most of admins might be as well that the board slightly misinform you about where is the upgrade to be looked after. The right place at present is:
http://www.phpbb.com/downloads/olympus.php
More rant you'll find right here:
http://cpptea.com/forums/viewtopic.php?f=16&t=146