n:
<ul>
  <li>Alpha channels and metadata (such as timestamps and comments)
  cannot be included when writing an image.  They are silently
  ignored when reading an image.
</ul>

<p>News in version 0.6:</p>
<ul>
  <li>Can now read from and write to Lisp streams, even those without
  file descriptors
  <li>Fixed bug causing crash on 64-bit platforms
  <li>Can now read, write, and represent 16-bit images.  (Previously
  downscaled to 8 bits on read.)
  <li>Fixed bug in reading of 1, 2, and 4-bit images on CCL