Just started having problems with my backups. Time Machine mounts the backup volume and starts backing up. After 3 or 4G it fails with a message that the backup drive is not available. Then, no matter what I do, I keep getting an invalid password whenever I try to backup, even after entering the correct password. It's set to connect via the device password. Time Capsule is running the latest firmware. I'm on OS X 10.6.7. The Time Capsule is set to join a wireless network (a Cradlepoint MBR1000 router). I don't think the disk itself is the issue as it's a brand new Samsung 2TB drive - and I have done the fan mod on the Time Capsule. Also, it doesn't appear to be dropping off the network as I can still ping it. This is driving me nuts!