[ZendTo] Captcha problems

[Steve Mason]

Is anyone else having issues with Captcha?
All through my testing, and now going production, I'm seeing issues quite
often.
 Sometimes it will work once, then any subsequent attempts getthe following
error:
Input error: invalid referrer.
 
This happens from different computers in different locations, with different
browsers, so I suspect something on the server end.
 
Any ideas?
 
Thanks,
 
Steve
 
 
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