This happened with the product include in producttab only, I think it’s a bug existed in my version, it generate the add to compare link with the Ajax link encoded. I bought this version through themeforest.net. Now when I checked the demo page like this: http://demo.snstheme.com/sns-avan/index.php/?___store=french. This bug didn’t exist.

So, could I get a updated version which this bug was solved already..

By the way, I met many other bugs in my version which is bought at March 2015…