png unsupported by Emacs 22.1

[poti@potis.org]

Is it possible that libraries that were compiled into earlier Emacs 
distributions are no longer in the current Emacs? I have been doing 
a lot of testing, so I may have made a mistake, but this seems reliable
enough that I prefer not to burn a new DVD unless others cannot
replicate. Note that on lab computers with more extensive software
installations, this works. So it needs to be on a PC with known lacking
png support. 

Using the released binary for Windows, attempting to use preview-latex
or to open a png file with C-x C-f I am told Emacs does not support png. 
Following is the information generated for image mode followed by that
for preview-latex:
---------------start image mode---------------

In GNU Emacs 22.1.1 (i386-mingw-nt5.1.2600)
 of 2007-06-02 on RELEASE
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/gnuwin32/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: Image

Minor modes in effect:
  shell-dirtrack-mode: t
  show-paren-mode: t
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <help-echo> <down-mouse-1> <help-echo> 
<mouse-1> C-x C-f <backspace> <backspace> <backspace> 
~ <return> <up> <return> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <return> TAB TAB M-b M-x 
r e p r <backspace> o <tab> o <backspace> r <tab> 
<return>

Recent messages:
Loading edmacro...done
Loading derived...done
Loading cl-macs...done
For information about the GNU Project and its goals, type C-h C-p. [2 times]
Loading image-mode...done
Type C-c C-c to view as an image.
indent-relative: Text is read-only [2 times]
Making completion list...
Loading help-mode...done
Loading emacsbug...done

--------------end image mode------------------
-------------preview-latex -------------------

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t

Major mode: LaTeX/M

Minor modes in effect:
  flyspell-mode: t
  LaTeX-math-mode: t
  shell-dirtrack-mode: t
  show-paren-mode: t
  encoded-kbd-mode: t
  tooltip-mode: t
  tool-bar-mode: t
  mouse-wheel-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  blink-cursor-mode: t
  unify-8859-on-encoding-mode: t
  utf-translate-cjk-mode: t
  auto-compression-mode: t
  line-number-mode: t
  transient-mark-mode: t

Recent input:
<help-echo> <down-mouse-1> <mouse-1> C-x C-f <backspace> 
<backspace> <backspace> H : <return> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <up> <up> <up> <up> <up> <up> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <up> <up> 
<up> <up> <up> <up> <up> <up> <up> <up> <up> <down> 
<return> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <down> <down> <down> 
<down> <down> <down> <down> <down> <up> <up> <up> <up> 
<up> <up> <up> <down> <return> <help-echo> <help-echo> 
<tool-bar> <preview> <help-echo> <help-echo> <help-echo> 
SPC <backspace> C-b n <backspace> <down-mouse-1> <mouse-1> 
<help-echo> <up> C-v <up> <down> <help-echo> <down-mouse-1> 
<mouse-movement> <mouse-movement> <drag-mouse-1> C-b 
C-y <return> M-b <help-echo> <help-echo> <help-echo> 
<help-echo> <language-change> <help-echo> M-x b u g 
<tab> <tab> <backspace> <backspace> <backspace> e m 
<tab> a c <tab> b u <tab> <backspace> <tab> <tab> u 
<tab> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> b u 
g <tab> <backspace> <backspace> <backspace> s e <tab> 
n <tab> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
<backspace> <backspace> <backspace> <backspace> <backspace> 
C-g <help-echo> <help-echo> <help-echo> <help-echo> 
<down-mouse-1> <mouse-1> M-x r e p l <tab> <backspace> 
<backspace> <backspace> <backspace> <backspace> o r 
<tab> <return>

Recent messages:
Type `C-c C-l' to display results of compilation.
error in process sentinel: preview-reraise-error: preview-image-type setting 'png unsupported by this Emacs
error in process sentinel: preview-image-type setting 'png unsupported by this Emacs
call-interactively: Beginning of buffer
call-interactively: End of buffer
Auto-saving...done
Mark set
Making completion list... [2 times]
Quit
Loading emacsbug...done