Problem with checking out using a G/C

[gamera_spinning]

I have a $50 gift certificate, and am trying to buy six riffs, totaling $23.93.  When I go to check out, I fill in my billng info, and select "Use Gift Certificate to pay for entire order".  It tells me on the left sidebar under Gift Certificate that I have a $50 GC.  I click "Review Order" at the bottom. 
It tells me: "Your order is not complete. Please review the details of your order and click Submit Order if all the information is correct. You may use the Back button to make changes to your order if necessary."

and below:

Payment Method
Subtotal: $23.93
Gift Certificates: -$23.93
Total: $0.00
Paying by: Zero Total
When I click submit, it tells me:

"Your final order total is 7.105427357601E-15, not $0. Please go back and select a different method of payment.

Your order is not complete. Please review the details of your order and click Submit Order if all the information is correct. You may use the Back button to make changes to your order if necessary."

Help.

[torgosPizza]

Ah yes, this is a rounding bug with our system ... sorry about this.  Did you try checking out again? I'm surprised that it would happen more than once ...

I'll look into it and post back ASAP.

UPDATE: I edited some code that should squash this bug. Please try checking out again and let me know if you still have issues.

[gamera_spinning]

That fixed it, thanks!  That's really fast customer service.

[torgosPizza]

Glad it worked for you. Enjoy the tracks!