4th ed. PHB errata needs errata...

[Grynning]

http://www.wizards.com/dnd/files/UpdatePH20080610.pdf

Death Saving Throw [Deletion]
Player’s Handbook, page 295
Remove “expressed as a negative
number” in the last sentence.

This would make the sentence read:

"Death: When you take damage that reduces your current hit points to your bloodied value, your character dies."

In other words, you die when you are bloodied.

Fail...

Edit: On MY part apparently. I just realized my mistake...they mean to delete it from the line above that one.
Well, enjoy the link, anyways.

Double Edit: How did I know that AK would have a readied action to shoot this down before I could edit?

[Azerian Kelimon]

No, YOU fail. Read it again.

It refers to that bit about "Healing surges expressed as a negative number", in death saving throw.