When you click on the "X" Close button for Option E on Chrome, it positions the flyover panel an absolute, rather than relative locations. So if your browser window is small, the flyover panel doesn't appear at all because it's below the fold. And if your browser window is large, the flyover panel appears way above the 'X' button. See attached screenshot for a mid-size window, where the flyover panel is right on top of the Close 'X' button.
I cannot reproduce this issue with Option A, because it's at the top of the page.
I found this bug using Chrome 17 for the Mac Lion OS.