Hi
If you are using the tabs inside a container with overflow: auto;, when using the scroll bars, the active tabs will not move along with the rest of the content, including the other tabs.

I found this discussion that helped me. Basically the solution would be eliminating the CSS property position: relative; from the rule: .viewsdisplaytabs-wrapper .viewsdisplaytabs-group-wrapper ul li a.viewsdisplaytabs-active,in line49 in my version(; $Id: viewsdisplaytabs.info,v 1.1.2.2 2009/07/15 08:19:30 solipsist Exp $)

For those who cann't wait for the new version just add: position: relative; to the container with the overflow: auto; property in your theme's css file