This question , for instance, renders in IE7 as a 1-line high textarea with vertical and horizontal scrollbars. All of the code appears to be on a single line. Works fine in Firefox 3.5.
Weird. Seems to be specific to that code block, as other ones look OK to me in IE8 and IE8 with IE7 mode on.
Probably we won't do anything with this as it appears isolated.