Bug#563040: [texlive-base] SIunits and ams* do not work together - misleading help?

[Frederik Schwarzer <schwarzerf@gmail.com>]

Package: texlive-base
Version: 2009-6
Severity: normal

--- Please enter the report below this line. ---

If I try to use "amsfonts" together with "SIunits", pdflatex gives me an
error, that these cannot be used together
    ! Package SIunits Error: The command \square was already defined.
    (SIunits)                Possibly due to the amssymb package.

It then says
    Hint: use option `amssymb' or `squaren' with SIunits package.
    See SIunits.dvi or readme.txt section: Known problems and limitations.

Note, that it already thinks, that I am using "amssymb" in the error message
above. Using the amssymb package does not change anything and squaren.sty
is not available in Debian.

Is that a bug or just one of the inconveniences that come with the texlive
complexity?

--- System information. ---
Architecture: i386
Kernel:       Linux 2.6.32-fs

Debian Release: squeeze/sid
  500 unstable        www.debian-multimedia.org 
  500 unstable        ftp2.de.debian.org 
    1 experimental    ftp2.de.debian.org 

--- Package information. ---
Depends                  (Version) | Installed
==================================-+-==============
texlive-doc-base       (>= 2009-1) | 2009-2
mime-support                       | 3.48-1
dpkg                  (>= 1.14.18) | 1.15.5.5
dpkg                  (>= 1.15.4)  | 1.15.5.5
 OR install-info                   | 4.13a.dfsg.1-5
tex-common               (>= 2.00) | 2.05
luatex               (>= 0.46.0-5) | 0.50.0-1
texlive-common         (>= 2009-1) | 2009-6
texlive-binaries       (>= 2009-1) | 2009-5
debconf                  (>= 0.5)  | 1.5.28
 OR debconf-2.0                    | 
ucf                                | 3.0025
debconf               (>= 1.4.69)  | 1.5.28
 OR cdebconf             (>= 0.39) | 
dpkg                  (>= 1.14.18) | 1.15.5.5


Package Status      (Version) | Installed
=============================-+-===========
tetex-bin                     | 
tetex-base                    | 
tetex-extra                   | 
tex-common                    | 2.05


Recommends         (Version) | Installed
============================-+-==============
lmodern        (>= 0.93.3-1) | 2.004.1-3


Suggests               (Version) | Installed
================================-+-===========
perl-tk                          | 
ghostscript                      | 8.70~dfsg-2
xpdf-reader                      | 
 OR pdf-viewer                   | 
gv                               | 
 OR postscript-viewer            | 
debhelper             (>= 7.0.8) | 7.4.10



--- Output from package bug script ---