acroread doesn't find libGL.so.1

Hi,

I installed acroread successfully, but it doesn't start properly but
produces this error message:

> /usr/lib/Adobe/Reader9/Reader/intellinux/bin/acroread: error while
> loading shared libraries: libGL.so.1: cannot open shared object file:
> No such file or directory

I'm surprised it doesn't find libGL.so.1 since locate points to several
locations of this library on my 64-bit system:

> $ locate libGL.so.1
> /etc/alternatives/glx--libGL.so.1-x86_64-linux-gnu
> /etc/alternatives/nvidia--libGL.so.1-x86_64-linux-gnu
> /usr/lib/mesa-diverted/i386-linux-gnu/libGL.so.1
> /usr/lib/mesa-diverted/i386-linux-gnu/libGL.so.1.2.0
> /usr/lib/mesa-diverted/x86_64-linux-gnu/libGL.so.1
> /usr/lib/mesa-diverted/x86_64-linux-gnu/libGL.so.1.2.0
> /usr/lib/x86_64-linux-gnu/libGL.so.1
> /usr/lib/x86_64-linux-gnu/nvidia/libGL.so.1
> /usr/lib/x86_64-linux-gnu/nvidia/current/libGL.so.1

I'd appreciate any hints!

Thanks in advance,

Cord