Here's the stacktrace, and as you can see when I print m._meta.fields, "modules" and "parameters" are DictionaryFields.
https://dpaste.de/AXXA
Instead of getting back dictionaries, I'm getting back strings. I have no idea what the issue is, but it's breaking all my templates that use models with hstore fields and new data cannot be saved unless i hand-serialize it into the HStore KVP format myself. Kind of obviates the usage of the hstore-field.