Display issue on IE

We are currently use SmartGWT 4.0 Power Edition. There are some issues on IE, and we have to specify the index as:
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE8" >

We try to upgrade to SmartGWT 4.1, but the option doesn't work any more. We tried this:
<meta http-equiv="X-UA-Compatible" content="IE=8" >

GUI shows up, but with the following issue:

- Unnecessary scrollbars (The panel is bigger)
- Incorrect font sizing in the menu items
- Roll-over expansion of list grid cells