see the diagram on page 281. This diagram is correctly drawn.
note where the burst 2 origin square is.
By Hypersmurf's reading, the 2nd square from the left at the top of the diagram should be blue....but it is not because the corner is not adjacent to the origin thus you must count around it.
(the goblin in the top right corner is hit because the statue is not blocking terrain.)
in fact, the rule for counting distance applies to this discussion perfectly..let me quote the whole paragraph. (page 273 for those who want to look it up).
Counting Distance
When counting the distance from one square to another, start counting from any adjacent square (even one that is diagonally adjacent but around a corner) and then count around solid obstacles that fill their squares. You must choose the most direct path to a target when counting squares for range or when determining the extent of an area of effect.
When counting distance, you must use the most direct path. This path does NOT include solid objects that fill their squars (walls for example).
When charging, you must move directly to the closest square that you could attack from. So, you count the distance using the most direct path to the creature..if you charge along this path, then you are moving directly to the closest square you could attack from. If you can enter that square, then you can charge.
Thus, you CAN charge around a corner if you have the movement.