Weird problem and some suggestions:

The problem: When FEC is on the site does not show warnings - if for example there was a problem prossesing a credit card it just go back to the payment page without saying anything. if you do the same with FEC turned off you see the warning that the card was declined. Any ideas?

Also I had a customer today that had a problem to complete the order (card kept being declined) although there was no problem charging her card with the same info on the authorized.net virtual terminal. It is actually not the first time it happen and no correlations between the cases either (different card types, browsers etc...). Does this sounds familiar to someone?

Now for the suggestions - the 1.4.5 version is really great and almost perfect as I said before (an was told the 2.0 version will have it) an AJAX to update the coupon and shipping info would make this one perfect. another this that would be great is if one could control the order of the fields from admin. For example if I want the shopping cart to be at the bottom near the payment info instead at the top. Another cool thing would be that if shipping billing is the same it will show only one field at step 2 with the check box "same shipping and billing just in case someone changed their mind. it will make the page a bit tidier.

All in all this is the best mod for zen cart.

Thanks