The "Supporting Online Material" available from Science has some errors. A corrected version is available here: SOM_revised3.pdf.
In addition, the authors wanted to provide an extensive catalog of the new impact sites as "Supporting Online Material," but Science determined that the catalog file size was too large for their system. Thus, the existing "Supporting Online Material" references the following catalog at the Malin Space Science Systems, Inc., web site: Catalog of New Impact Sites on Mars Formed May 1999 -- March 2006.
Readers of the Malin et al. (2006) Science paper are strongly encouraged by the authors to examine both the corrected Supporting Online Material and the Catalog of New Impact Sites.
Author comment submitted on 26 October, 2009 by Kenneth S. Edgett ( firstname.lastname@example.org )