s = ""
function z()

{ return Math.floor( Math.random() * 1000 ); }

for ( i=0; i<10000; i++ ){ db.foo2.insert(

{ s : s , a : z() , b : z()}

); }

shard on a,b and make a couple of split points

db.bar.find( { $min:

{ a: 0, b: 0}

, $max:

{ a:1000, b:1000}

, $query: {} } ).itcount()

gives the correct count, but

db.bar.find( { $min:

{ a: 0, b: 0}

, $max:

{ a:1000, b:1000}

, $query: {} } ).count()

doesn't