I'm using an R4 with the 1.8 Beta Firmware, Japanese Kingston 1GB. The game froze on two seperate occassions when I put my DS in sleep mode - first during a conversation with the protagonist's father, and the second during a battle. Power-cycling on the second incident gave me a regular NDS boot-up screen, with the R4 undetected in Slot 1. Is this something R4 or DS related, or is it the battery? Much thanks for replies.