I refer to the post below.
IE now displays the data, but I can not set an automatic width on the gridpanel or get it to stretch across the width of the box in anyway, with the scrollbar showing with any configuration at all, and every config works in FF. Worst is when u drag it the drag mask is more than 100% page width, it is OK when dropped.
IE thinks the content of the panel is 100% width, and the panel does not constrain the gridpanel inside its own width, whereas FF does.
I see a few of us have this problem.