Vanishing Lettermail

Here's a little snag I hit and figured out.... in case someone else hits the same snag - I'm rebuilding by web site, local host, in 1.3.9d and have my mods copied over, including Canada Post - which worked except that Lettermail quotes weren't showing up even though letter mail was enabled in admin/config/modules/shipping/Canada Post.

I thought I must have mucked up a merge, so went through all the files and found nadda.

Then I checked admin/config/shipping-packaging - and there was the problem - there is a default Tare % set, which was pushing my product weights over the limit for lettermail.

I set the tare rates to zero, and all is well in the world.