I just got my R4 last week. I love it so far, but some times (it's happened twice since I got it) it will freeze up at random times on games. It happened yesterday with THPG when I was going from menu to menu and it happened last week with Sonic Rush. I restart my DS and it doesn't even detect the R4. I have to restart it 2 times to get it back up again. Is this something normal? I'm using the newest version of the firmware btw.