Title should not overflow the content area
A few things to check for:
Non-breaking text in the title, content, and comments should have no adverse effects on layout or functionality.
Check the browser window / tab title.
If you are ...
Nested and mixed lists are an interesting beast. It's a corner case to make sure that
Lists within lists do not break the ordered list numbering order
Your list styles go deep enough.
Ordered - Unordered - Ordered