I can't get SideTrack to scroll horizontally in Firefox on my iBook. Research tells me to set mousewheel.horizscroll.withnokey.action to '0' and mousewheel.horizscroll.withnokey.sysnumlines to 'true' in about:config, but when I use the touchpad to scroll horizontally all it does is replicate the vertical scrolling action. Without altering those settings, the horizontal scrolling zone on my touchpad does nothing at all. Horizontal scrolling works perfectly in Finder and other applications so I'm betting it's a Firefox problem. Any ideas? I'm using the PPC-optimized version of Firefox 1.0 (if that makes a difference). Thanks.