[robg adds: This is definitely new in 0.9.2; I have both it and 0.8.6, and there's no scrubbing via scroll in 0.8.6. You can also scrub with a Mighty Mouse, and with any mouse capable of horizontal scrolling -- which should be any mouse with a scroll wheel. You just need to hold Shift while using the scroll wheel to scroll horizontally while using such rodents.]

