CHANGES IN CUPS V1.6.4
+ - Removed some duplicate size definitions for some ISO sizes that were
+ causing problems (<rdar://problem/14722721>)
+ - The IPP backend did not add the "last-document" attribute
+ (<rdar://problem/114660379>)
- Added a SyncOnClose directive to cups-files.conf to force cupsd to
call fsync before closing any configuration/state files it writes
(<rdar://problem/14523043>)