Nick Aster points out that the 'World Council on Tall Buildings' (straight out of the X-men) decided that the Petronas Towers in KL are the tallest building in the world despite the fact that the Sears tower in Chicago is blatantly taller.

"Measured to the top of the radio masts, Sears' height is 1,518ft, which easily eclipses Petronas' 1,483ft. Trouble is, the masts on top of the Sears Tower don't count, but the mast on top of Petronas' does. Hmm, confused? The masts on the Sears tower are not considered to be a part of the actual building, so the official measurement stops at 1,450ft. So Petronas gets the crown."