Quote Originally Posted by delia View Post
My lone client using this had a shipping charge come back $10 more than it should be. I checked everything - the weight of the shipment, addresses etc. Using the online tool returns the correct amount but the customer got overcharged in Zen Cart. Has anyone else seen this happen?

Can someone point me to information about API changes? I need to be aware of upcoming problems before they hit.
First things I'd rule out - on the Canada Post shipping mod - there is facility to add a mod generated handling charge - bottom of the edit mod screen in admin. There is also facility to add handling charges to different rates in the Canada Post Profile (link to this at top of the edit mod screen). I suppose a less likely place to peek would be in admin/store to see if there is a currency exchange factor in play.