I've got this 3 document in a collection: http://pastie.org/1114659 , and I have these query objects:

{'fields.5.3.0': 31}

    (nº1)

{'fields.5.6.0': 31}

    (nº2)
The first two document differs only in the name of a key (I changed it from "3" to "6"), and the third is like the first only with one nested dictionary less.
Obviously, the query nº1 should match the 1st and the 3rd document, and the nº2 should match the 2nd document, but:
> db.bug.find(

{'fields.5.3.0': 31}

).count()
1
(instead of 2)
> db.bug.find(

{'fields.5.6.0': 31}

).count()
1
(it seems corrent)

Am I mistaking somewhere?