I just updated my firmware to 4.8a M67. And every time I turn my DS on it just freezes when I push the "A" button to look at my games list. Should I just revert back to the last firmware? Post Merge: [time]1272417524[/time] *bump* I've waited several hours for a response because I honestly can't figure out what's wrong with the firmware.
You can try reverting to an older firmware, initializing it, then remove the old firmware, then downloading the most recent firmware update here. Hopefully, it'll work then. For future references, I suggest using the Sakura firmware. It's much faster and has MUCH less freezing going on (I use it almost 98% of the time).
Here's a link for downloading more skins for Sakura: http://gbatemp.net/index.php?showtopic=89197#sknen. Just go to the section marked 'M3 Sakura Skins' and they'll be a lot of them there!