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You have any browser extensions that might be misbehaving? (I work for Stack Exchange). Nothing on our side could be sending that to you.

• alandarev 13y ago
  Using other stackexchange sites is fine. I am no longer able to validate whether addon-less browser would work, as the issue is mysteriously resolved now.
  • tinkertim 13y ago
    I blame Cthulhu. Mystery solved.