IE6 Peekaboo Bug
I hadn't run into this one in my own work before: the IE6 Peekaboo Bug. In my case, I had a div containing text as well as 3 left floated divs with a background image, also containing text, and nested in the main content div. In IE6, the text in the main content area was invisible until you scrolled on the page. The fix? Line height added to the main content div.
