Why the gridview layout breaks in IE7?

http://210.22.155.222/group/3431/explore-learncentral

You can see it by simp开发者_运维百科ly clicking the Members tab.

It's fine in Firefox and IE8, each <tr> contains 4 items,

but in IE7, the layout is broken,each <tr> with only 2 items.

What's wrong in IE7?

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I can't get to your page, see what happens when you turn compatability view on/off?