Hello Olof, Another document of interest in this context is the attached paper from SSAC, also available at http://forum.icann.org/mtg-cmts/stld-rfp-comments/general/doc00004.doc Thanks for posting this paper from SSAC. This work was done by SSAC in 2003 in response to the issues raised with the support for new TLDs in existing Internet application software. It is interesting that the SSAC recommendations are similar to those discussed in the last Council call in response to the issues raised by Ken Fockler in the GNSO Public Forum in Luxembourg. The SSAC recommendations were: RECOMMENDATIONS 1. ICANN should develop an advisory regarding support for new TLDs for display on their website, and the GNSO constituencies should publicise this advisory through their membership and customer bases. 2. ICANN should recommend that the IAB consider issuing an informational RFC advising of the issue, and publicising this through the IETF technical community. 3. Internet infrastructure providers that have their own customised software for Internet service provision should test the capability of the software to support new TLDs, and correct problems quickly where they are found. 4. Internet software application developers should be encouraged to review their software for support of new TLDs. Where problems are found, application developers should upgrade their software, and provide these updates to their user base. 5. A central repository of known commonly used software that has compatibility problems (e.g., DNS resolver software used by common operating systems) with new TLDs, and instructions for how to upgrade the software should be created. This repository would facilitate Internet infrastructure providers and software application developers to provide necessary software updates to users of the Internet to resolve known compatibility issues. 6. ICANN should examine compatibility problems with the introduction of new TLDs in 2001 as a topic in its Proof of Concept study.