Quote Originally Posted by lat9 View Post
I just received a report that a store's customer using IE8 was unable to checkout using One-Page Checkout. I've replicated the issue and hope to have a solution sometime tomorrow.

If you're using this plugin and you've got a high percentage of IE8-using customers, you might want to disable the plugin until that solution is available.
I've made this correction on the plugin's GitHub repository and updated its current version to 1.0.4-beta2.

If a customer "hits" your site using a version of IE less than 9.0, they'll continue the checkout using the "traditional" multi-page checkout due to incompatibilities provided by those older browsers' javascript support.

That change is "booked" for the plugin's v1.0.4 release, coming to the Zen Cart Plugins RSN (real-soon-now)!