I heard that. but that is why is weird. My site is not hosted in the UK nor in New Zealand. It is hosted in The United States. (Somewhere in Texas i guess) , And after i changed my layout/theme thats how i got those results.
If you make drastic changes to your web page your positions will drop. If at all possible try to make gradual changes in between crawls.
what? Should i use the geolocalisation at webmasters tool? i think it will drop my other rankings everywhere. wouldnt it?