Fx3rc1 on 10.4.11, litmus test case 5028, focusing the search box and using the mouse scroll well or using touch pad scrolling does not switch search engines. Steps: 1. Focus the search box 2. Spin the scroll wheel or scroll up/down using touch pad Expected(?): Search engines should switch. Actual: Search engine stays the same. However, in the mac you can do this action in conjunction with the Apple key and this works.
Yes, using ctrl-wheel scroll in windows/linux works.