gLCD weirdness

Other Hardware Displays
1

I've had a Sparkfun Colour LCD shield for ages

I decided to build a new version of my "Tracker Jacker", so I tried the gLCD library, works great!

At least all the demos do.

I then tried a Mandelbrot program and a Conway's Life just to make sure it works.

THEN tried this

#include <TinyGPS.h>

#include <gLCD.h>

const char RST = 8;
const char CS = 9;
const char Clk = 13;
const char Data = 11;

gLCD graphic(RST,CS,Clk,Data,HIGH_SPEED); //High speed
TinyGPS gps;
void getgps(TinyGPS &gps);

int buttonPins[3] = {
  3, 4, 5};
  
void getgps(TinyGPS &gps)
{
  float latitude, longitude;
  graphic.Clear();
  graphic.setCoordinate(0,0);
  gps.f_get_position(&latitude, &longitude);
  graphic.print("Lat/Long: "); 
  graphic.print(latitude,5); 
  graphic.print(", "); 
  graphic.println(longitude,5);

  int year;
  byte month, day, hour, minute, second, hundredths;
  gps.crack_datetime(&year,&month,&day,&hour,&minute,&second,&hundredths);

  graphic.print("Date: "); graphic.print(month, DEC); graphic.print("/"); 
  graphic.print(day, DEC); graphic.print("/"); graphic.println(year);
  graphic.print("  Time: "); graphic.print(hour, DEC); graphic.print(":"); 
  graphic.print(minute, DEC); graphic.print(":"); graphic.print(second, DEC); 
  graphic.print("."); graphic.println(hundredths, DEC);
  
   graphic.print("Altitude (meters): "); graphic.println(gps.f_altitude());  

graphic.print("Course (degrees): "); graphic.println(gps.f_course()); 

graphic.print("Speed(kmph): "); graphic.println(gps.f_speed_kmph());

}  
  
void setup() {  
  Serial.begin(4800);
  graphic.begin(0,0,0,EPSON); //Normal Epson
  graphic.setBackColour(GLCD_BLACK);
  graphic.setForeColour(GLCD_WHITE); 
  graphic.setFont(Normal_ClearBG);
  graphic.setCoordinate(0,0);
  graphic.Clear();
  /* Set up the button pins as inputs, set pull-up resistor */
  for (int i=0; i<3; i++)
  {
    pinMode(buttonPins[i], INPUT);
    digitalWrite(buttonPins[i], HIGH);
  }
}

void loop() {
  int c;
   while(Serial.available())    
      c = Serial.read();    
      if(gps.encode(c))     
      {
       getgps(gps);   
      }
    else
    {
      graphic.println("Waiting...");
    }
}

Just sits outputting "Waiting..."

I know the GPS is working because I tried the tinyGPS library outputting to the serial monitor, that works great, the EM-406 LED is doing it's 1 flash/second thing, so I know the GPS is locked and loading NMEA sentences.

Have I missed something?