mplayerthumbs doesn't create thumbnails when enabled

Binary package hint: kdemultimedia

I have cleared KDE configuration (made backup) in my Natty installation and enabled mplayerthumbs in Dolphin.

Thumbnails were not created. I have mplayer from medibuntu installed as well, it can play those movies without problems.

Feel free to ask for further info.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: mplayerthumbs 4:4.5.95-0ubuntu1
ProcVersionSignature: Ubuntu 2.6.37-11.25-generic 2.6.37-rc7
Uname: Linux 2.6.37-11-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sun Jan 9 13:47:51 2011
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
ProcEnviron:
 LANGUAGE=cs:en
 LANG=cs_CZ.utf8
 SHELL=/bin/bash
SourcePackage: kdemultimedia