First off thanks for the module. It is great. I am using it successfully on other sites that don't use EVA.
Not sure if I would really say this is a bug with this module but it is not compatible with EVA: Entity Views Attachment.
When both enabled it causes an infinite loop and you get an error like: "PHP Fatal error: Maximum function nesting level of '500' reached, aborting! in ....../includes/cache.inc on line 335"
This is because
function _extrafield_views_integration_get_extra_fields_for_entity_type($entity_type, $bundles, &$extra_fields) {
foreach ($bundles as $bundle) {
$temp_fields = field_info_extra_fields($entity_type, $bundle, 'display');
This function is called by extrafield_views_integration_views_data. When field_info_extra_fields is called it in turn calls eva_field_extra_fields which needs Views information so it comes back to extrafield_views_integration_views_data thus causing the infinite loop.
The only way around this that I can think of right off is making a custom version of field_info_extra_fields that would call all implementations of hook_field_extra_fields except eva_field_extra_fields. Though that feels kind of hacky.
I am not sure if is worth it but it would nice if there was some kind of notice on the project page that it is not compatible with EVA since it has over 25k usage.