One of my customers just discovered a problem in the gift certificate code.
If the gift message has double quotes in the message:
Message: A Belated "Merry Christmas" to you.
the order gets processed, the credit card gets charged, but the thankyou.cgi
The emails do not get sent and the gift certificate isn't generated.
There is an order generated but when you try to print out the gift certificate
that fails, obviously, since the gift certificate wasn't generated.