Table scroll problem

Hi all!
This is probable a bug for Safari 4.0.4, Chrome and eclipse browser on mac os x 10.6.2.
When you have vertical scroll in table (many columns), after you have scrolled to the last column (scroll to right ->>, at list firs column should not be seen ) scrolling down is not working property : it go back to the first row, but if you scroll back to the firs column (the scroller should be tightly to the frame line ) it works fine. Look at VaadinTunes, resize the window and you will see this issue.
Is there are some fix for this issue ?

Thanks.