Update, 01:36am – this bug was just fixed in iTunes Connect, and PCalc has been submitted correctly. Thanks Apple!
I’m currently trying to submit an update to PCalc for iPhone, built with the GM iPhone 3.0 SDK, and it’s failing. The “Contact Us” section of iTunes Connect doesn’t actually let you contact anybody, except for very specific problems, so I’m at a loss at how to proceed. I throw myself on the mercy of the crowd.