AbleCommerce Shopping Cart Software

I have had several customers call into our store to tell me my website is broken. While going through checkout the click on Pay With Card nothing happens. No pop-up no error message, nothing. I thought to ask the last caller and he said he is using Internet Explorer. Nothing is showing in the error log, it does not show as an abandoned basket and I went online with the last call, he didn't even show up under Who is online? I am not sure what to tell the customers, has anyone had any issues?

Just check my local install of 7.0.3 with IE8 and it seems good to me. Give a try to reproduce it here
http://demo.ablecommerce.com/ac73_stable/Default.aspx

Don't know if this is the case, but if a field validator has a message, because
a text field is empty or whatever, the page won't post until the validator message goes away.

Example, if you don't provide a password, this message will be displayed
and Submit Order button won't fire:

•You must provide a password to create an account.

Maybe the user has scrolled down near the bottom of the page
and didn't see this message above the Submit button.

I will ask on the next call to make sure, thanks.