In Ubuntu (Gnome) there is absolutely no way the change the mouse wheel scroll rate for GTK applications. It is hard-coded in GTK and determined by a "smart" algorithm which dynamically depends on the window size.
So I downloaded the source and found the function that returns the step value. I changed it to return a very small number first, and then 0 (to see if it has any affect at all).
./configure make sudo make install
as instructed by GTK website.
It compiles with no problems (I have the libraries)
Bu then, I restart and it has absolutely no affect. My guess is Ubuntu is still using the original GTK it shipped with. What do you think is wrong here?