MC40 slow reaction at data-input on touch-screen

during testing at my customer , he recognize that , when he enter the data's very quick , the touch / display seams to be slow .

When you see the little video , you can see how slow the entered chars will displayed at the display .

The video is stored : http://www.sendspace.com/file/f1cvmc     ;  pw is : motorola

to delete file in 1 week later  : http://www.sendspace.com/delete/f1cvmc/e5cbaec36560c4cb0826c1201daa5653