A few related questions:
* Is there a maximum size of item updates that can be sent from Lightstreamer to the browser?
* Is there a maximum size of messages that can be sent to LS using engine.sendMessage?
* Are either of these limits different when you have multiple windows sharing the same engine?

I'm curious, because I'm not sure how LS shares its engine between multiple browser windows. If it's done by setting cookies, then there may be a size limit imposed by some browsers. But I haven't seen anything about this in the documentation.