Comment 12 for bug 1035578

Yes, confirming this is still an issue for full-screen windows launched after Onbord became visible the last time. This may be a problem of this specific use case, regular showing and hiding, e.g. by auto-show, does bring Onboard to top. When I launch chromium --kiosk first, Onboard last, it works here (Quantal).

Ultimately Onboard is at the mercy of the window manager. We can only suggest the stacking order, compiz is free to ignore that as it sees fit.