[Developers] Postal code: surprising MQL time-out

[Will Moffat]

Hello,

Can anybody explain why this query times out?
[
   {
     "*" : null,
     "limit" : 1,
     "sort" : "-timestamp",
     "timestamp" : null,
     "type" : "/location/postal_code"
   }
]

It seems pretty innocent, "show me the info on the last postcode added  
to Freebase".

Removing the "*":null makes it work, but why does it time-out in the  
first place?

thanks,
-Will