eZ publish 3.0 does not support postgresql 7.3.x. It supports only 7.2.x. We will make support for 7.3.x as soon as possible. There are two problems with 7.3 and eZ publish. One is realy simple. But another one is not that simple.
the simple one is the LIMIT #,# problem.
the more difficult putting '' values into numeric fields *g* i might have one reliable solution. i will try implementing this one with a friend tomorrow.