Hi Paul,
Also, is there a way to have "Auto crop" the default, or is there a shortcut to that option?
Yes, there's a Default print Properties button below the page preview, Fred calls it the Zebra button. The default settind are automatically saved.
See screen shot below.
Using the Zebra button on a thumbnail does the same thing but you do need to click save there too to retain as the default.
Although you may change prints size the crop lock will "stick" unless you change the default setting and save it.
Back to your first comment about driver setting:
What fixed it was in the Canon printer driver: "color" has to be active (rather than "no color correction").
I'm afraid that is not correct for colour managed printing - look at the instructions for any printer profile - and "No Color Correction" or No Color Adjustment" is given as the correct setting in the driver. I wonder if you have not been comparing like with like as PS does not remember driver settings and has been reverting to the "color active" setting.
The second screen shot is the driver setting instructions for Ilford profiles - it's the same for any printer profile.
My 1st screen shot below also shows what QU Print Properties should look like when using a printer profile.
One other thought, are you making any profiles with your ColorMunki and are you setting the driver correctly when printing the target? It should be exactly the same as given above: "no color correction".
Terry