This issue is for the Virtual Scrolling feature. I'm not exactly sure if this a bug or not, but I find that when the grid's “page” option is set to a value
The scrolling and row display issues occur on IE8, Safari, and Chrome. On Firefox, the virtual scrolling works beautifully without issues, and it even works on IE6 and IE7.
This issue can be recreated from the demo site by the following steps, running on IE8, Safari or
Curretly no solution. The same effect in IE can be seen if you scroll some rows and then click on header button to hide the grid. After that try to show it. Seems to be a problem with show/hide in IE.