I didn't want to start a new thread because I've got a very similar question 'bout strange mitre. It's from Serbia:
Is it common in Serbia? I'm used that mitre looks like this
No, it isn't common in Serbia.
This is a photo of retired bishop Atanasije. He introduced it about a decade and a half ago (notwithstanding the strong presence of Sinaites - monks from Sinai in 15th century in Serbia), and was the topic of comments of faithful as a fancy dress and taken as yet another extravagance of his.
Since Metropolitan Amfilohije (photo above) was many times first bishop of Serbian Orthodox Church to do something, like he was the first one who visited the Roman Pope,
and the first one to say Muslim prayer in public during the service for building an Orthodox Churchhttp://www.youtube.com/watch?v=Z21NdQLVG5w
and the first one to attend entronement of a Roman Pope
Yet, Metropolitan Amfilohije has never made a public appearance in Serbia wearing the mitre like the above, but I guess he couldn't let this wave of novelties pass without his participation. Therefore, he took a photo wearing it.
Consequently, no, it isn't common in Serbia.