(1) * html .page .toc {height:1%}
IE sometimes has issues rendering content within or around floated elements. In particular I have found odd lines disappearing at odd times in the page table of contents. Applying a height of 1% with the Tan hack (so only IE see it) corrects it. Possibly applying position:relative will also correct it. For full details of the IE bug refer
http://www.positioniseverything.net/articles/hollyhack.html
(2) * html pre {width:95%;}
IE incorrectly expands wiki <code> and <file> content passed the edge of the screen if there are overlong lines in the content. Without a specified width the pre style setting overflow:auto does not kick in. This can be corrected by applying a width as shown above.