I’m getting this error after add/remove item to/from cart. Add to Cart button does ajax call to add item to the cart. This kind of json string which will be used in top cart:

I’m stuck. Can you tell me where should I start from to debug?
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
the “Add to Cart” button does not work asynchrounisly in Magento’s default behaviour. That means that you installed/developped a module to do this. For us to help you, we need to know what is it.
Anyways, this looks like a
Zend_Dumpor maybe adie: make a search in your files for these strings and see what comes up