I'm using ExtJs 3.4 to create TabPanel with document direction tag set to right-to-left dir=rtl. The TabPanel renders fine with the arrow button to scrollLeft and scrollRight. But the scrollTo doesn't work for some reason, regardless of what value I put to it. I tried to just do scrollTo('left', 100, true) but the tab doesn't scroll to the left. Can anyone guide me to the right direction?