title: Emacs under Windows and PNG files
body: <p>Would anyone have any pointers on getting PNG images to display in Emacs 23 under Win32?..  I have installed the gnuwin32 set of utilities, including libpng and zlib; C:\Program Files\GnuWin32\bin is in path.  JPG files started working but not PNGs.  I'd appreciate any hints on getting this to work.</p>
  
  <p>EDIT: PNG thumbnails actually display fine (e.g. in dired via C-t C-t).  However, opening them fails (opens as garbage in fundamental mode, and M-x image-mode says "invalid image specification").</p>