Note the floated block at the upper right. In the MIX06 (March 20) version of the IE7 Beta 2 preview, do the following:
ALTto make the menu bar appear, re-flowing the page.
The floated div is now gone. It will reappear after you resize the window or refresh the page.
Other ways to trigger this instead of switching windows:
Hover here: no problem.
Here are the conditions I've found so far:
<address>, text wrapped in
<i>, or text with text-style: italic applied via CSS.
<address>element, there must be only one on the page.
Plain text. Italicized text.
Some text. Hover here: problem. | Hover here: problem.