The system-wide behavior that supports horizontal scrolling using a traditional (non-ball) scroll mouse is that you simply hold down the shift key. This worked fine in Safari until the Flashback removal update from Software Update. Now the shift is ignored in Safari, leaving me unable to horizontal scroll. Other apps still support shift-scroll.
Does anyone have an idea how I can fix shift-scroll in Safari?
Using OS X 10.5.8 and Safari 5.0.5