Hi,

there are a couple of things I can think of:

1 - the MaxMind databases are not 100% accurate even on a country level. Therefore it's possible that you just have to put up with a few false classifications.

2 - update the databases each month to ensure you have the freshest data. (use the button in the back end). I have seen this fix problems like your one.

3 - the current setup in Chameleon does not detect country for IPv6 addresses. I am working on an update which will use the updated MaxMind databases which can do IPv6. Unfortunately it's not completely straightforward and I don't want this to break existing installations so it's taking a while to get right. I'm hoping for a release by the end of September.

Would you be able to track down any of the people who got mis-categorised and find out their IP addresses? You may be able to do that directly if you know them, or if you can find out exactly when they connected to the site you may be able to find them in the web server logs. Then get their IP address from the logs or from them directly, and see if it's an IPv4 or 6 address. If it's IPv4 you can test it at MaxMind.com to see what country it thinks it is and that might help track it down.

I'll be interested to know what you come up with.

Hope that helps,
Stephen