I just applied supee-6788 to my magento store running 188.8.131.52.
The customer registration not working, after submitting the information, page reloads with empty data. Customer login works fine.
I tried to put
<input type="hidden" name="form_key" value="<?php echo Mage::getSingleton('core/session')->getFormKey() ?>" />
still not working, and error log show nothing.
Also, I reverted the patch, the problem gone. looks like the problem is from SUPEE-6788,
Does anyone know how to fix this? Any help will be appreciated