I currently get NYSE OpenBook from two different sources. Once a stock has opened, one of my sources never shows a crossed market in OpenBook - the bid is always less than the ask. This makes sense because any orders that "reach across" are marketable, and should be held/handled by the spec, and never get to the book, right? The other source routinely shows crosses, perhaps as though it were showing marketable orders that have been entered and are awaiting being paired off by the spec. Is the second source whacked, and maybe just not processing messages in the right order, or is the first source purposely discarding any crossing quotes? Who do you get your OpenBook from, and which behavior does it exhibit? Reminder: I'm talking about normal trading conditions, once a stock is open, not imbalances or other unusual circumstances.