are they even glued? they should squirt some gorilla wood glue before assembling and there would never be an issue.
I've worked on hundreds of Williams/bally games and maybe 5% have corner separation problems after all these years.
it's not exactly rocket science to put together a wooden cabinet that is already CNC'd. Yet Stern finds a way to screw it up.
Agree they need to get a quality control supervisor ASAP - especially for the prices they charge.