For many years I've used the
xeromouse driver with the A-Eon/Logitech mouse that came with my X1000 in order to get horizontal scrolling by tilting the scroll wheel. I don't use horizontal scrolling nearly as much as vertical, but it comes in handy sometimes.
Unfortunately, this driver no longer works correctly under Update 3. The basic mouse functions work fine -- movement and buttons, including the middle mouse button -- but the scroll wheel does nothing, and won't scroll vertically or horizontally (in developer terms, RAWMOUSE events work, but MOUSEWHEEL events do not).
The driver comes with source, so I may be able to add some debugging code to try and figure out where it's going wrong. Until then, I've had to remove the driver and go back to the OS4 HID driver. It only has vertical scrolling, but that's better than no scrolling at all.