After upgrading from 3.4.1 to 3.4.2, countries of sites are frequently identified as "unknown". And, this phenomenon is still observed in version 3.5.
For example, even though host name "degw.cs.ritsumei.ac.jp" is resolved, the country of the site is identified as "unknown.", if the version is later then 3.4.2.
Does anyone have good idea to fix this problem?
Thanks in advance.