I have a MightyMouse... and while trying to get it to work with horizontal scrooling found the issue. It never say my horizontal scrolling, BUT I found this bug. I am just here to help confirm it.
-- Scrolling fast with the mousewheel triggers history back and forth https://launchpad.net/bugs/31827 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs