Unable to create remote connections

When I try to add a new remote database connection, I can't select any database driver and thus, cannot create the connection. I have installed all the QT4 database driver packages for PostgreSQL, SQLite and MySQL, as well as libpqxx.

I think this is an Ubuntu bug, and not a Calligra one, since I've verified that the same functionality works fine in another distribution (Exherbo).

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: kexi 1:2.5.1-0ubuntu1
ProcVersionSignature: Ubuntu 3.5.0-14.15-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
Date: Mon Sep 10 08:00:05 2012
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=
 LC_COLLATE=C
 PATH=(custom, no user)
 LANG=de_DE.utf8
 SHELL=/bin/zsh
SourcePackage: calligra
UpgradeStatus: Upgraded to quantal on 2012-09-07 (2 days ago)