This module has an on-board 3.3V regulator. It takes 5V in from the VCC pin and provides 3.3V power to the ublox chip. You really should use resistors between the Arduino TX and GPS RX pins. It may work for a while or forever. The spec says no more than 3.6V into the RX pin. The Arduino outputs ~4.7V.
If you put 3.3V into the VCC pin, the regulator can barely provide enough voltage for the ublox chip. It looks like the ublox can only send part of a TeXT notice message before it gives up.
Cheers,
/dev