NewSoftSerial vs SoftwareSerial on Arduino 1.0 and baud rate problem

Hi Guys
Question 1:
I was using NewSoftSerial v 10 library on a older Arduino IDE 0022 version.
Baudrate = 19200.
I read right data from serial, without losing anything.
With Arduino IDE v1.0 that includes SoftwareSerial provided by Arduiniana ( last version of NewSoftSerial ) I lose some data.
Do you guys meet the same problem?

Question 2:
I have a gps module that can work with many baud rates but using NewSoftSerial Arduino UNO is not able to work with baud rates higher than 19200.

Connecting the GPS directly to PC's serial port it can work at 115200 too.

Thanks Fulvio