IKEA has an annoying habit of being too lazy to write instruction manuals for their furniture, relying instead on a bunch of cutesy drawings that are supposed to tell you what you need to do. Recently I purchased a bookshelf (Expedit) and learned this lesson the hard way. For future reference, this:

means “on the off chance you are not clairvoyant enough to figure out from these cryptic drawings everything you could possibly need to know, but are clairvoyant enough to recognize that there’s something you don’t get from the pictures, and are also clairvoyant enough to know Ikea’s phone number off the top of your head, but are too stupid to know that it’s Ikea you should be calling for assistance, here’s what to do.
Also note that this:

means “Don’t even think of putting this bookshelf in an upright position until it is fully assembled or the damned thing will collapse under its own weight.”
Betcha didn’t know that.
UPDATE: To their credit, they took it back without incident. Heading home now with a new one, and one more opportunity to find my same butt with my same two hands and the same flashlight, but a slightly more detailed butt-map.
FINAL UPDATE: The butt-map makes all the difference. Once I knew what should have been in the instruction manual but wasn’t, assembling the next one, and the rest of Mrs. X’s new set, was easy.