I just upgraded a site from CartThrob 2.1.3 to 2.5 (along with updating EE to 2.7.3). Everything seems to be fine, but I'm having a glitch during the checkout process. It may very well not have anything directly to do with CT, but I'm stumped as to what's going on. Any suggestions would be really appreciated. Here's the situation:
I have set up a subdomain for the upgraded site, for example, beta.testsite.com (the regular site url is formatted like www.testsite.com). During the checkout process, I have an initial https page where the customer enters their name, as well as choosing a shipping option and entering a shipping address. When submitted, that page is supposed to return the second checkout page, where credit card information gets input.
I've checked the template for the first checkout page, the cart scripts file that gets embedded, and the htaccess file -- none are explicitly calling the www version of the domain.
Any suggestions on what might be the culprit?
(I realize this is a somewhat vague issue with lots of potential variables, but I'm stumped. Thanks in advance.)