Is it possible that search would be case insesitive, i.e. doesn\'t matter if I enter UPPERCASE or lowercase characters?

If you mean the search in the collection or playlist then it\'s case-insensitive already.

If you mean the Related Artists, then yes, it should be case insensitive, cause I have albums by Ian Gillan, but Last.FM insists on IAN GILLAN

Case insesitive search with latin characters works correctly in Playlist and Collection Browser. But case insesitive search with Cyrillic characters works only in Playlist, but doesn\'t work in Collection Browser.

A bug?