I am using my own key bindings.....
L/R keys for 1 frame nudge and { } for 5 frame nudge and "Y" to scrub.
Go to Preferences and make sure you are looking in the
"video view" bindings section and then pick "advance 1 frame" for whatever key you like and "step backward 1 frame", then you also have a choice to keybind "advance several frames" (which is 5) and just repeat the bindings where ever you like.
Dont forget to use these bindings you need to in VIDEO VIEW and not in any other window.