I just noticed that when a question's title is long enough that it would normally wrap around, it does so a tad late. If the title has a word in the right place, it gets cut off by the background(?!?) of the page.
Looks like someone messed up on the padding for the
#question-header rule. It is currently set to
padding: 20px, which puts 20px of padding on all four sides. Anyone who knows CSS also knows that by default the padding is not included in the width of the box, so the actual width of the box ends up being 40px wider than the page itself, causing 40px of space to the right side (20px of which would always be empty, or the right padding) that will always be cut off if text is present in that area, due to display properties on the ancestor elements.
I'm not exactly sure why they need padding on the left and right sides, and it looks rather silly with that padding there. It seems like that's where the actual mistake is. I think it's supposed to be
padding: 20px 0 which would add padding to the top and bottom, but not the sides.