with Django 1.5 the detail_configurableproduct.html template is doesn't load because Django's subclass of simplejason.JSONEncode is not compatible with simplejson > 2.1. To fix can we simply use the JSONEncode class directly from simplejson?
I included the link to a commit in the bug description, but it doesn't really fix the problem, because it doesn't take into consideration all these possible situations:
django.utils.simplejson is availble (with Django<=1.6), or simplejson <= 2.1 is installed: the current code works in this situation.
django.utils.simplejson is not availble (with Django 1.7 and up), and simplejson > 2.1 is installed: In this case code doesn't work because of what I said up top.
django.utils.simplejson is not availble, and simplejson is not installed: the module needs to be refactored to either be compatible with the Python standard lib's json or with simplejson which would become a dependency.
I think I'll work on something to implement a solution for the third situation as it is the most durable solution. It will use json with fallback on simplejson in case someone is using Ptyhon 2.5