[thelist] Help needed replicating a quick error

Hi all,
I am having the weirdest error with a credit card provider. The provider is
saying their system works fine, and there "is something wrong on my side".
My client is going berserk, I've been looking for this for a week now (took
me 3 days to find this weird error in the first place, the browser kept
hanging).

I have created a form where you can replicate the error as follows:
1. Go to http://poorbuthappy.com/formtest.html (and write down the CC
number on the page)
2. enter a number < 100 and click the button
3. on the next page, enter the CC information as detailed on the page
before and hit "pay".
4. It should work and give you a confirmation screen.
5. Now do the same steps with a number > 100 (try 101), and after entering
the credit card info and hitting "pay" the browser should just hang.

If you could send your results to me (peter@poorbuthappy.com), and if you
get different results include your broswser, OS, that would be a great
help. I'm bleeding time and money here, it's really frustrating.... sigh
Thanks!
Peter