We recently upgraded to MongoDB 2.6 and we're now having errors all over our code base. The main issue relates to $oid queries (see below). I can't find anything on the MongoDB website related to error #17287. Is this a Moped issue?

The operation: #<Moped::Protocol::Query
@length=103
@request_id=5
@response_to=0
@op_code=2004
@flags=[:slave_ok]
@full_collection_name="prd-supercore.organizations"
@skip=0
@limit=0
@selector={"_id"=>{:$oid=>"535d2d75da8da77f44000047"}}
@fields=

>
failed with error 17287: "Can't canonicalize query: BadValue unknown operator: $oid"