identity/convert fig.ps is not returning the correct value

Dears,

I use Ubuntu 8.04 and imagemagick-6.3.7.9.dfsg1-2ubuntu1.

I want to convert a multi-page ps (post script) file in an animated gif:

> convert fig.ps fig.gif

But I got a fig.gif with only 1st page of my ps file.

Using identify, I got this:
> identify fig.ps
fig.ps PS 522x732 522x732+0+0 16-bit DirectClass 172kb

but, should be:
fig.ps[0] PS 522x732 522x732+0+0 16-bit DirectClass 3.27982mb
fig.ps[1] PS 522x732 522x732+0+0 16-bit DirectClass 3.27982mb
fig.ps[2] PS 522x732 522x732+0+0 16-bit DirectClass 3.27982mb

This very same problem was happing in my Mac OSX Tiger 10.4.11 with
Fink. Then I downloaded
http://www.imagemagick.org/download/binaries/ImageMagick-universal-apple-darwin8.11.0.tar.gz
and installed as indicated and identify/convert start to work as
expected.

So I try the same approach for my Ubuntu. I downloaded
http://www.imagemagick.org/download/linux/fedora/i386/ImageMagick-6.4.2-3.i386.rpm.
Because I use Ubuntu I had to convert this rpm to deb via alien and
installed it. In order to make it work I also have to get libtiff.so.3
in my /usr/lib.
However this approach didn't work and I still have 'convert fig.ps' to
animated gif not working in my Ubuntu.

NB: if using fig.pdf or fig.tiff (multi-pages files), conversion to
animated gif is fine.

Is it a bug as it seems to be to me?

Any idea of how can I solve this issue? I probably have to communicate
Ubuntu too because their package is clearly failing for me. In time, I
tested in Suse 10 ImageMagick 6.2.5 and this functionality was OK.

Many thanks in advance,
Alan

-- 
Alan Wilter S. da Silva, D.Sc. - CCPN Research Associate
Department of Biochemistry, University of Cambridge.
80 Tennis Court Road, Cambridge CB2 1GA, UK.
>>http://www.bio.cam.ac.uk/~awd28<<