IE6: Dialogs containing dropdown menus become distorted briefly when dragging a dialog to a new position

[James Cunningham]

Steps to reproduce the defect:

1. Open the Ajax sample in IE6.

2. Open a dialog that contains a drop down menu (e.g. Table Properties)

3. Drag the dialog back & forth from the left to the right of the screen.

Result: See that the dialog becomes distorted briefly due to the dropdown menus in the dialog.

[Garry Yao]

We have a changed situation with IE6, right now we'd only mark it as a compatible browser while does not guarantee its fully functionality, which means we'll not provide further fixings (like this case here) for it unless with a severity of functionality loss.