1. EXT4 support.
2. Large file system support (e.g. /data > 2G).
3. Updated reboot recovery mode.
To install (you need root):
1. Backup /cust_backup/image/recovery.img
2. Download, extract and place the recovery.img into /cust_backup/image/
To go to recovery:
1. Power off
2. Hold Vol+ and Power buttons to power on (hold both buttons UNTIL you see the recovery)
EDIT: If your phone won't boot with this recovery please try this. Credit to stockwell.