Backed out changeset 3c126eebea64 (bug 981145)
Backed out changeset e8afab50c7fe (bug 980372)
Backed out changeset 89ddc7709fa8 (bug 980136)
Backed out 5 changesets (bug 910412) for intermittent crash whack-a-mole.

Backed out changeset e3eb9463b3e1 (bug 910412)
Backed out changeset d5863d302bde (bug 910412)
Backed out changeset 422b66d4b1ca (bug 910412)
Backed out changeset 3431d59d752e (bug 910412)
Backed out changeset b1c0310cdac1 (bug 910412)