Has anyone had this problem? I was working on a song in sequencer mode performing pattern copy. Suddenly, the memory jumped from 45% to 15% and the pattern play/rec would not work. Worse, the whole sequence would not work. And when I went to program mode the sounds would not work and the readout showed alien squiggles instead of the usual stuff. I eventually solved the problem by reloading the original factory programs from a card, but I'm now worried about the machine's dependability. I lost all of my work on the song, although the sequncer seems to be working fine. The Korg help line suggested a low battery problem, but I never got a low battery message. I've been waiting for one for the last eight years, and it's never shown up.