Do you have a link the the thread about slacker causing the problem? I listen to slacker too and it could make sense because if I recall right I was listening to slacker just before it happened both times.i went to look at Motorola's Droid fourms to see if this problem has been reported and i found out that it has. And many are saying that there is a link between Slacker radio and their SD cards being wiped. I use Slacker frequently so i have uninstalled it and i hope to never have this happen again. You might want to do the same.