Backed out 6 changesets (bug 918828) for mass bustage on a CLOSED TREE.

Backed out changeset b59c02df792f (bug 918828)
Backed out changeset 12e7deed1b17 (bug 918828)
Backed out changeset b87ca498ea9a (bug 918828)
Backed out changeset 621224c58e71 (bug 918828)
Backed out changeset 4faff84eb1ba (bug 918828)
Backed out changeset 3695c1c812a5 (bug 918828)