Problem with custom haystack router after upgrading to 0.9

[andreyfedoseev]

I use a custom haystack router that inherits from haystack.DefaultRouter and overrides for_read and for_write methods. After upgrading from 0.8 to 0.9 it suddenly stopped working, the for_read method is never called, however the router class is instantiated (__init__ is called).

If I downgrade to 0.8 it works fine.