In Minecraft Version 1.6, Phantoms were introduced, and as happy as we are, there are a slight number of bugs. For starters, Phantoms don't swoop down and attack players, although I am aware that you guys are currently working on this bug. In addition, the change-log says that Phantoms will spawn in 3 to 4 days without sleep. My sister and I were up for about 6 to 7 days until a Phantom finally spawned. ONLY ONE !
Lastly, when Phantoms do spawn, they seem to just go up, and up, and up, and up in the sky until they disappear.
Thank-You for the amount of time and dedication you guys put into reading all these bugs. Have A Great Day