modilabs/formhub — pull request #536 by larryweya (2012-07-25 14:16:18+00:00)
Title: Removed assert when value is not a basestring

Tested using a dump of json mongo data with the dataset that has the issue and can't replicate.
The value can only be a scalar, perhaps not necessarily a string. If its anything else it will be exported as it it.