Build 21382 in the meantime, still with the USB Printer problem.
Sure it's an old USB Printer Canon IP4500, but it would still works (with an Win 8 driver). Yes, could buy a new one, but who can tell me that I would haven't the same problem again?
The printer issue has been fixed.
So if you feel it's still an issue file a Feedback
and share the link here for Eddie (MSFT).
Or it could be an OLD driver issue.
The USB printer problem is back with build 21382, Fails also with my HP Laserjet 1020.
I will file another FBH report.