SMIL not working correctly

One of my websites (http://strasweb.fr) uses heavily SVG+SMIL for animations and Midori does not render it correctly.
Here is a testcase:
http://rudloff.strasweb.fr/SMIL/bugs/boules.svg

It works correctly in Firefox, Chromium and Arora but in Midori the circles are not animated correctly.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: midori 0.4.0-2
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
CheckboxSubmission: f6dc68df5258d8a3ae67f8670f3af481
CheckboxSystem: 7e42599bda39ea7ff8b528272b6ef52b
Date: Tue Dec 27 18:23:59 2011
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
ProcEnviron:
 LANGUAGE=fr_FR:en
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: midori
UpgradeStatus: No upgrade log present (probably fresh install)