There are several different shields that can be bought on the net. The shields that I bought from China had some errors.
I could not get the SD card to work. On the LCD module the connector was not working and the Touch Screen + TFT LCD + SD (firstname.lastname@example.org, design by JQT, 5/6/2012) had the SCK and SI switched.
TFT LCD Mega Shield V1.2 with SD card connector is not working for SD card.
NOTE: The wiring or routing is wrong SCK and MOSI is switched on the Shield (red PCB).
The best approach is to solder and remove the resistors and the connector.
The setup is MEGA 1280 + TFT LCD Shield + 2.4" TFT Display with SD card slot.
NOTE: Remove the SD card connector & resistors on the display module (blue PCB).
Solder a new SD card connector to the SHIELD.
SD card pin SHIELD (pin)
1 (CS, SS) 53
2 (DI) 51
The SD Library works with both FAT16 & FAT32.
The UTFTtf Library works only with FAT16.
Use some hot glue to fixate the potentiometer (blue brick on the red PCB) and the wires on the TFT Shield.