En el post en XDA que indicas, hay instrucciones al dedidllo para instalar la ROM, si las sigues tal cual no debes de tener problemas... esto es lo que he visto:
How to install perfectly i9003
- Install Driver Samsung and reboot your computer
Format your SDexternal with SDformter
https://www.sdcard.org/downloads/formatter_4
With Odin 1.85 only !!!
Full LF2
PIT > latona_20110114.pit
[BOOTLOADER] only need come from froyo ! no need on GB ...
PDA > CODE_I9003DDLF2_CL1153545_REV08_user_low_ship.tar. md5
PHONE > MODEM_I9003DDLE1_REV_00_CL1149304.tar.md5
CSC > GT-I9003-MULTI-CSC-ODDLF2_RST.tar.md5
in bootanimation samsung sound Reset Odin and pull off batterie
CF Root in PDA only
in bootanimation samsung sound Reset Odin and pull off batterie
Wipe data factory reset
Mounts and storage > Format/system Format/emmc (sdcard sdcard0)
Flash rom + gapps
Wipe cache and dalvik cache
Suerte
