ICANN Successfully Conducts Laboratory Tests of Internationalised Domain Names
The laboratory tests that ICANN have asked Autonomica is done. The report state there are no problems at all, which was for me not a surprise.
Autonomica AB has, under a contract with ICANN, investigated whether the addition of top level domains containing encoded internationalized characters (so called IDNs) would have any impact on the operations of the root name servers providing delegations, or the iterative mode resolvers used to look up the information. No impact at all could be detected. All involved systems behaved exactly as expected.