Ugh... Sorry for "double-post", but i've found new info!
Problem not gone. Well atleast not completely. Just problem was't in "short cut buttons". Problem in searching system. When i'd reinstall the browser, all options back to basic (and "searching system" to - google). And with "google" shortcuts works fine. But if i change searching sistem to "Yandex", "Yahoo!" or "Bing" - it cause problem with shortcuts. Back to google - problem gone.
I'm just fount it, and not tried other "searching system", so - may be some of them can cause same problem.
Any advice about this situation?