log in thru mig33 site.
go to room and choose person to pvt.
press enter 2 or 3 times
the other person (if logged on thru phone) will see a new pvt window open.
The window will be blank.
Every time you press enter 2 or 3 times, the victim will see the pvt window blinking, but when he looks in the pvt window there wont be any message-just a blank window.
This is a simple trick-not very useful, but I thot Id share it with u guys.