Checking MD5 sums... MD5 mismatch!
adb shell # cd /sdcard/clockworkmod/backup/2010-06-18.104.22.168 # rm nandroid.md5 # md5sum *img > nandroid.md5
NOTE: As rpearl stated, there could be something really wrong with your nandroid, so use this tutorial as a learning experience and not a fix-all. In my case, everything was fine after restoring. However, that may not always be the case. Do this with caution.