On render broken characters (Windows)

I’m using Synfig on Windows7 64 and using text layer with multibyte characters.
I checked Cairo setting everywhere i found but still it renders with broken text.
It renders text fine in working area and breaks only in render. (I see Cairo checkbox in preview mode but not in render dialog, is it ok?)

synfig command line screen shows error:
warning: Layer_freetype multibyte: invalid multibyte sequence - is the locale set?