GeolocationProvider lookup fails for certain IP's on Maxmind's 20131105 database. Lookup works ok using Maxmind's own API.

2014-01-24 11:25:57,742 ERROR [235] EPiServer.Personalization.Providers.MaxMind.GeolocationProvider.Lookup - Error occured while looking up 89.28.14.35: The given key was not present in the dictionary. (Stack trace:    at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
   at EPiServer.Personalization.Providers.MaxMind.Geographics.GetRegionName(String countryCode, String region)
   at EPiServer.Personalization.Providers.MaxMind.MaxMindGeoIp.ExtractRecord(Int64 ipnum)
   at EPiServer.Personalization.Providers.MaxMind.MaxMindGeoIp.ExtractRecord(IPAddress addr)
   at EPiServer.Personalization.Providers.MaxMind.GeolocationProvider.Lookup(IPAddress address))

For the following IP's:

188.138.220.213
87.194.8.130
89.28.24.190
81.105.200.109
81.129.251.84
86.171.166.139
62.254.140.196
109.185.116.199
62.49.29.13
37.233.21.238
188.138.220.213
212.250.161.123
31.134.239.72
82.23.12.63
94.12.52.125
188.138.220.213
86.140.18.137
86.168.229.114
2.25.236.76
86.168.229.88
92.115.142.36
86.134.44.182
82.23.12.63
188.138.220.213
89.28.24.190
181.226.39.107
89.28.14.35

is this a bug?