Not knowing the version but if installed with F7 then I assume 2.0. Under Edit > Preferences > Advance d > General > Browsing there is a box to check for smooth scrolling. It may work for you. It didn't work so well for me.
I use the extension called smoothwheel.
Distribution: RHEL 5.1 with Pieces of this and that.
Kernel 188.8.131.52, KDE 3.5.8 and KDE 4.0 beta, Plus Development src.rpm, ATI fglrx64_7_1_0-8.433-1 rpm with 3D and DRI working.
Acer 5100-5840 with webcam, ati, sdcard reader, sound, atheros based wireless, all working. Only thing not working is the memory stick reader.