smplayer runs one time and never again

[Achim]

Binary package hint: smplayer

I saw this bug on different systems: Ubuntu Natty, Linux mint, Kubuntu, etc.: I run smplayer one time and it will never start again. If i fire it up in terminal, it tells me:
----> ~$ smplayer
----> Das ist SMPlayer v.0.6.9 (SVN r3447) running on Linux
It tell's me, it runs - but there's nothing to see from it's gui - but in the sysmon: There it runs and sleeps.
I deleted its config-dir - it does still not show up.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: smplayer 0.6.9-1
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Tue Jun 7 14:58:43 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=de_DE:en
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: smplayer
UpgradeStatus: No upgrade log present (probably fresh install)