New tags trigger foreach() errors in taxonomy_fields.module

Any time I add a new tag to a node, the next page load (to anywhere) results in the following error repeated once per tag on the node:

# warning: Invalid argument supplied for foreach() in /var/www/tac/modules/taxonomy_fields/taxonomy_fields.module on line 774.

My limited debugging skills tell me that taxonomy_fields_get_node_info($node) on line 759 is returning a mostly empty array instead of the more informative array that it should (and does, on later page loads) return. I do not know why, but it is possible that I have an unusual or invalid configuration.