xine not playing mkv files after nvdia driver installation

Boas,
Depois da instalação do driver da nvidia, seguindo o processo abaixo mencionado, o xine deixou de conseguir abrir ficheiros *.mkv (Matroska). Não dá imagem, nem som.
 
Processo de instalação do driver da nvidia:
 
Before doing this, I first first added the non-free Debian repositories to my /etc/apt/sources.list and then updated my system. This is my sources.list after adding the non-free repositories :
 
deb http://ftp.de.debian.org/debian/ etch main contrib non-free deb http://security.debian.org/ etch/updates main contrib non-free # deb-src http://security.debian.org/ etch/updates main contrib non-free
 
Once that was modified, I needed to do a few more things to get ready for the Nvidia installation.
 
su - apt-get update apt-get install build-essential
 
then I had to type in the terminal
 
uname -r
 
to find out what kernel version I was running. The kernel I had was 2.6.18-4-k7. From there I installed the kernel headers by typing in the terminal as root user :
 
apt-get install linux-headers-2.6.18-4-k7
 
Obviously you should type “uname -r” in the terminal to find out which kernel you are running and install the appropriate linux headers for that particular kernel. As an example if you have 2.6.18-4-686 then you should install linux-headers-2.6.18-4-686.
 
From there I downloaded the drivers from Nvidia via :
 
wget http://us.download.nvidia.com/XFree86/Linux-x86/1.0-9755/ NVIDIA-Linux-x86-1.0-9755-pkg1.run
 
I then logged out Gnome and hit Cntrl+Alt+F1 to drop into a basic shell. To be on the safe side I also typed in the terminal :
 
su - /etc/init.d/gdm stop
also execute chmod 755 NVIDIA-Linux-x86-1.0-9755-pkg1.run
 
After that I changed into the directory where the Nvidia drivers were downloaded and as root user typed in :
 
sh NVIDIA-Linux-x86-1.0-9755-pkg1.run
 
From there a familiar Nvidia installation wizard ran me through the Nvidia installation. Once the installation was over I typed in the terminal :
 
startx
 
and I was back into Debian Etch, but now running at my monitor’s 1920×1200 native resolution.
 
Link--> http://lunapark6.com/debian-40-etch.html

Este processo de isntalação é para o debian 4(etch), no entanto, e de acordo com a minha pesquisa, pode tambem ser utilizado no debian 5(lenny). Dá uma mensagem de erro relativo á versão de GCC,no entanto a instalação é feita com sucesso, e tenho o 3D a funcionar. Comprovei isso com o glxgears e glxinfo.
 
No entanto, se quiserem opinar sobre qual o melhor processo para instalar o driver da nvidia, estou aberto a sugestões.
 
O mais chato no meu disto, é que tanto o totem, como o mplayer correm bem este tipo de ficheiros. Apesar do xine não conseguir dar imagem nem som no que diz respeito a ficheiros *.mkv, o mesmo já não aconteçe com os xvid/divx. Consegue abrir sem problemas.
 
Quero ouvir as vossas opiniões sejam elas quais forem, a respeito disto.
 
PS: Vou reinstalar o xine para ver se altera alguma coisa.
 
Abraço
Mosh