Why is my XBee S1 outputting 1.1V?

This system did work for several days up until i noticed my breadboard power supply was outputting the wrong voltage. I am supplying 3.3v to DI pins. When RF activated the DO pins on receiver output 1.1-1.3v. I have ordered second radio thinking that it may be a radio issue. I set the second radio up using save profile from when the system was working. Once again, when voltage is supplied to transmitter; the reciever then goes from 0.0V to 1.1-1.3V on all 6 DIO pins. Any ideas?

I think this is normal. I seem to remember seeing this years ago. I know for a fact there is something about a 1.2v limit.