CSS for both the Main and Meta sites seems to have changed sometime in the last 24 hours. Links are now confusing as hell. There's a baffling mixture of light red, dark red, and blue coloring all being used for visited/unvisited, depending on which section of the page you're looking at. The main content of the page, other areas of the main content, and the different sections of the sidebar all seem to have different rules on which color means visited and which color means unvisited.
User profile layout is all borked too.
On Meta when I use my mod-power to view deleted comments inline, the CSS makes them unreadable.