sprint
Axe-Master
Not sure if related, but I do a lot of complicated midi into Ax3 via midi cable from midi foot controllers (not FC) and software (Bome Midi Translator Pro). When programmimg something new, I'll invariably screw up and send some sort of garbage midi to Axefx. The Ax3's reaction to this is that the front panel display will show a blue line at top or bottom (can't remember which off hand), and the preset switching becomes messed up until I either reboot the unit or send a proper preset change.