So today, after scrolling the wrong way on three different occasions I decided to snoop around about:config for any possible fixes. Turns out the fix was easy.
- Enter about:config in the address bar.
- Press OK to move pass the warning (if you are using Firefox 3b1 anyway)
- In the filter bar enter: mousewheel.withcontrolkey.numlines
- You should see one entry with the value of '1'. Change it by double clicking it and entering '-1'.
I love fixes that are obvious, easy to find and intuitive.