Hi Alan, M0x0 is an empty signbox in the middle lane. You found a conversion error. In SignPuddle 1.5, the SignSpelling Sequence for diaper used 2 detailed location symbols. In SignPuddle 1.6, the detailed location symbols have been dropped. Across all of the various puddles, there appears to be a couple dozen such problems. I'll investigate this further and fix the errors first thing next week. Thanks for the QA work, -Steve