I was concerned about one of my SD Cards crashing my SJ.  Joe would you have any idea what would cause this?  Or Line 6 Miller or any of you guys out there?  The card worked fine for about 2 months and then it started apparently causing the amp to "pop and re-boot."  It did this 4 times and then I just wouldn't plug it in any more.  The first time it crashed was just with one of the tracks but it would read the rest of the tracks on the card.  Then it crashed everytime I plugged it in.  It wouldn't read anything on the card.  I had the card completely filled up with backing tracks and songs.  And the other full cards I have work perfectly (so far).  I have been going through the rest of my cards to see if they are o.k. and they seem to be.  I have about 9 other full cards.  Could this be just one isolated incident with a defective card?  I was concerned when I read some other folks were having the same problem.  Could the WAV files I've put on there be somehow corrupted?  I have owned the SJ for over a year and it is GREAT.  I always do the same procedure as far as dragging the MP3's into i Tunes and converting to WAV and have been successfully doing that ever since the upgrade to 2.09 so I can rule that out.  Any input/opinions/information anybody has on this matter would be greatly appreciated.