The URL is for the newer ICC spec. that is mentioned in the Adobe PDF Reference Manual 1.6 Bibilography page 1060. We should first see if there is an upgrade for our icclib tree and then integrate it and test it.
For the record, icclib is now at: http://www.argyllcms.com/icclib_src.zip icc.c is up to version 2.05 and the change history includes this: * Started adding support for ICC V4. Not enabled yet. Graeme details (some of?) what is needed to support 4.1.0 in todo.txt. If there is interest, I could submit a patch to upgrade gs's icclib to the current version, but as stated it does not yet fix this bugid.
This seems to be a bountiable bug for adding v4 support to icclib. If Graeme beats someone to it we should close.
*** Bug 690062 has been marked as a duplicate of this bug. ***
Closing since the icc changes will fully support V4.