I have a Logitech mouse, and after Seamonkey Portable's last update, I can no longer just press down on my mouse wheel and get smooth scrolling.
You know, where the little four-point compass icon appears and you move your cursor this way and that to scroll.
The arrow keys still scroll, and so does rolling the mouse wheel, which I set to one screen at a time.
And in Firefox, the little four-point smooth scrolling compass still appears and works when I press down on the mouse wheel.
But I can't seem to find any kind of fix for this in Seamonkey.