some logitech mice have this problem with mfc applications, although you'dn't notice it or it's less annoying in regular apps than a browser naturally.
there's a kplugin to address this issue
http://kmext.sourceforge.net/initiative/mark307_files/lwheel-0.0.3.zip
extract the dll in kmeleon\kplugins folder and restart kmeleon
(kplugins folder not the plugins folder)
if it still doesn't scroll or scrolling is jerky then it's better to update drivers, in the long run this will be a better solution as it's system-wide
http://www.medical-online.com/mware.html
-read carefully and make sure to install the right driver for your mouseand operating system