The DNS search tree algorithm in the s2s should account for international domain names. For example "co.uk" is a common domain name. So, if searching for:
the search should stop at example.co.uk and should not continue to co.uk. The algorithm can be that if the last portion of the domain is a two-letter domain, then stop the search at the 3rd level domain instead of 2nd level domain. However, we need to research this to confirm that this is how international domains work.
Although this is a minor security issue, it should be fixed.