Not that I'm a big advocate of iTunes ... been burned by this application in the past, know to stay as far away from it as possible.
If the change significantly impacts the iTunes protocol implementation in the DNS-###, D-Link Engineering may opt to post a note that iTunes 9 may not be supported. Assuming D-Link Engineering operates with the same software/hardware design practices that are used by many large companies, a review on the impact of implementing an update to support iTunes 9 will be required.
IMHO, the lesson here is that upgrading to the latest version of an application is not always recommended as it usually "breaks" something else on one's system or network. It would have been in Apple's best interest to ensure that their product remained backwards compatible (ex: Camotec 's iPhone) and continued to provided support for non-Apple servers such as the DNS-###.
That said, Apple has never been very "friendly" to 3rd party vendors.
