Hmmm - I took a peek at a couple clients I recently upgraded - one from 4.1, the other from 4.3. In both cases, I migrated data (didn't pull over the company) and re-convert. In both cases, the Status field in both customer and vendor is populated. In the 4.1 client, the field in Customer Maintenance was field 82 (field 74 is a UDF). Vendor master - field is 37. In the 4.3 client, customer master field is 83 (no UDFs), vendor master field is 52. These clients have different modules, and as noted, converted UDFs are not at the end of the file. Both differ from my local install, which is vanilla, non-migrated, and matches File Layouts.