2009.3.1503.35 to 2010.2.722.35 behavior difference

[Lenny_shp]

I noticed on a cbo dropdown with autopostback was not re-positioning the screen (as if Ajax is not taking place) to its vertical location and when I referenced 2009.3.1503.35 version the problem went away.

Update:   Behavior is back to normal with 2010.2.809.35.

VS2008 IE8.