[Developers] error in returned type?

[Christian Hirsch]

using this query:
  {
    "id" : "/en/brave_new_world",
    "type" : []
  }

returns the following type ids:
      "/common/topic",
      "/book/book",
      "/media_common/adapted_work",
      "/guid/9202a8c04000641f80000000070f1e70",
      "/book/written_work"

using then these ids, e.g.:
  {
    "*" : [],
    "id" : "/en/brave_new_world",
    "type" : "/book/book"
  }

...works fine, except for this query (returns error: "not a valid
typename"):
  {
    "*" : [],
    "id" : "/en/brave_new_world",
    "type" : "/guid/9202a8c04000641f80000000070f1e70"
  }

I assume this is because /guid/9202a8c04000641f80000000070f1e70 has only the
type "/freebase/type_profile" and not "/type/type". But why is it then
returned by the first query above? Could this be a bug?
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