I have still not been able to overcome this problem. I would like to launch my store this coming week but not if this is going to be a problem.... I have the same problem when trying to purchase the official ZenCart Manual, and others seem to be having this problem. This also happens when I visit c u c u m b e r m e d i a . c o m and try to purchase the manual. I am able to store cookies from other sites that I visit and make purchases from. Here is a listing of my settings:
I am running Windows Vista, IE 8.
The error occurs using IE8, and Firefox.
The error does NOT occur using Google Chrome, Opera, or Safari.
I have Norton Internet Security installed, however have turned this entirely off (ALL settings) and still recieve the error.
In IE8 I have entered the following settings:
Security - set to Medium, unchecked "Enable Protected Mode"
Advanced Privacy Settings -
checked "override automatic cookie handling"
"Accept" 1st party cookies, "Prompt" for 3rd party cookies
checked "Always Allow Session Cookies"
I have cleaned out the browser's cache and temporary internet files
InPrivate Browsing is turned off
Just as a sidenote, I have ZenCart 1.3.9h installed locally for store development purposes and am using WampServer v2.0. Testing locally I have the same problem when attempting to execute the customer login link or add to cart link. I am using the classic template.
****Please don't forget to note that I cannot even purchase the ZenCart Manual from the ZenCart.com site - so this is not only a problem for me, it is also a problem for ZenCart itself.
Here are some links to other threads I have found on this issue:
http://www.zen-cart.com/forum/showthread.php?t=170751
http://www.zen-cart.com/forum/showthread.php?t=165460
http://www.zen-cart.com/forum/showthread.php?t=163930
http://www.zen-cart.com/forum/showthread.php?p=973895
http://www.zen-cart.com/forum/showthread.php?t=41387
http://www.zen-cart.com/forum/showthread.php?t=166127
Please someone suggest something... (DrByte?) I am getting desperate here!