On the HID site check out this warning when switching languages...

If you are getting this message, it is because

a) The Volusion Live Chat javascript has been modified from its original code.

(You must re-copy the script from the SETTINGS screen of your live chat software, and re-paste it to your website.

or

b) The Volusion Live Chat javascript is pasted more than once in this page.

(Remove extra copy of this script on this page)
Also, you might fix some of the pretty serious errors you have going on.. no one is perfect and some errors are just stupid stuff, but you have some pretty serious ones going on.

The currency conversion worked fine for me... No issues what so ever.

There are no hidden fields in your header.... The the forms showing on the page.

Are you maybe referring to hidden text? As you have enough hidden text to be banned from Google good! Just every other example of this menu I have ever seen... it is not coded correctly and ALL child nodes are hidden w/ css display set to none... which is spamming. This menu must be coded correctly as not to have hidden text... and I promise this has nothing to do w/ SSU.... CSS rather is the issue.

And 2 other issues... your newsletter box set to default checked will get you a blacklist recommendation from the FTC.... and processing credit cards w/o an SSL?????

Not making a mess here, but you have some pretty big issues..... not at all related to currency conversion here.

~Melanie