PS -- this bug also occurs if you have any additional product fields defined, and then search in the admin for a product (modify product, etc...)
This is not a 4.1.9 bug -- this is a bug in the upgrade from 4.1.8 (or earlier) TO 4.1.9, since the structure of the database changed, and xcart failed to account for this.
My guess is this bug will continue to pop itself up as admins upgrade their stores with non-xcart tables created in older versions. It's too bad xcart didn't give the developer community a heads up on this and seeded them with pre-release copies.
Forgot, there is no beta program. We're the beta program.
