This may be slightly off topic, but I'm adding it here in the hopes of helping someone out in the future.
I have also had problems with the SF SerLCD, but probably of my own making. I uploaded a sketch while I had the LCD connected and lost the second line of the display. I tried several variants of the code supplied by sti robot but could not get the "Reset to 9600 Baud" message to display, or the second line to resurrect itself. Finally, I used the following and it reset and the second line will display now. Note that I am NOT sending the 0x7c (124) control character in the sketch, but it seems to work anyway!?!
//resets the serial LCD to its factory Two Line settings
//Leave power to the LCD unplugged and USB to the LCD plugged in
//Upload the program, pull the USB, then reconnect USB
//Connect power, GND and RX
//Should see "Reset to 9600 Baud" followed by square dots
//now on both lines
//Serial.print(0x7C, BYTE); //special character
Serial.print(18, BYTE); // Reset to 9600 Baud
Serial.print(6, BYTE); //Reset character for 2 Lines on LCD