I've just submitted v1.0.2 to the plugins' area for review (if you can't wait, you can download it from either the plugin's GitHub repository or my website).

This version provides changes to address the following issues (as identified by their issue numbers in the plugin's GitHub repository):
#13: Form won't submit under IE-11
#14: Pre-integration with "Product Delivery by Postcode (PDP)"
#17: Missing semi-colon in language file
#18: Error-log generated when the customer has applied a discount coupon
#19: Move customer's authorization check
#20: Include both ZC1.5.4 and 1.5.5 versions of "handlesCreditCardDataOnSite"
#21: Correct interoperation with some shipping methods
#22: Correct AJAX session-save issue
#23: Session time-out handling
#24: Display payment-method block when in "special checkout"